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Finding the Fourth Proportional to 578,077.40, 867,116.10 and 311,700.80

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Solution

The fourth proportional to 578,077.40, 867,116.10 and 311,700.80 is: 467,551.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,077.40 : 867,116.10 = 311,700.80 : x
  2. Step 2: Convert to fraction form
    578,077.40/867,116.10 = 311,700.80/x
  3. Step 3: Cross multiply
    578,077.40x = 867,116.10 × 311,700.80
  4. Step 4: Simplify right side
    578,077.40x = 270,280,782,062.88
  5. Step 5: Solve for x
    x = 270,280,782,062.88/578,077.40
  6. Step 6: Final answer
    x = 467,551.20

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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.