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Finding the Fourth Proportional to 425,221.79, 637,833.56 and 399,240.23

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Solution

The fourth proportional to 425,221.79, 637,833.56 and 399,240.23 is: 598,861.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,221.79 : 637,833.56 = 399,240.23 : x
  2. Step 2: Convert to fraction form
    425,221.79/637,833.56 = 399,240.23/x
  3. Step 3: Cross multiply
    425,221.79x = 637,833.56 × 399,240.23
  4. Step 4: Simplify right side
    425,221.79x = 254,648,812,010.75
  5. Step 5: Solve for x
    x = 254,648,812,010.75/425,221.79
  6. Step 6: Final answer
    x = 598,861.16

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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.