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Finding the Fourth Proportional to 522,082.80, 783,124.20 and 312,130.80

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Solution

The fourth proportional to 522,082.80, 783,124.20 and 312,130.80 is: 468,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,082.80 : 783,124.20 = 312,130.80 : x
  2. Step 2: Convert to fraction form
    522,082.80/783,124.20 = 312,130.80/x
  3. Step 3: Cross multiply
    522,082.80x = 783,124.20 × 312,130.80
  4. Step 4: Simplify right side
    522,082.80x = 244,437,183,045.36
  5. Step 5: Solve for x
    x = 244,437,183,045.36/522,082.80
  6. Step 6: Final answer
    x = 468,196.20

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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.