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Finding the Fourth Proportional to 579,220.92, 867,013.74 and 398,250.32

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Solution

The fourth proportional to 579,220.92, 867,013.74 and 398,250.32 is: 596,125.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,220.92 : 867,013.74 = 398,250.32 : x
  2. Step 2: Convert to fraction form
    579,220.92/867,013.74 = 398,250.32/x
  3. Step 3: Cross multiply
    579,220.92x = 867,013.74 × 398,250.32
  4. Step 4: Simplify right side
    579,220.92x = 345,288,495,064.33
  5. Step 5: Solve for x
    x = 345,288,495,064.33/579,220.92
  6. Step 6: Final answer
    x = 596,125.73

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.