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Finding the Fourth Proportional to 522,614.70, 721,222.38 and 307,715.22

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Solution

The fourth proportional to 522,614.70, 721,222.38 and 307,715.22 is: 424,655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,614.70 : 721,222.38 = 307,715.22 : x
  2. Step 2: Convert to fraction form
    522,614.70/721,222.38 = 307,715.22/x
  3. Step 3: Cross multiply
    522,614.70x = 721,222.38 × 307,715.22
  4. Step 4: Simplify right side
    522,614.70x = 221,931,103,330.62
  5. Step 5: Solve for x
    x = 221,931,103,330.62/522,614.70
  6. Step 6: Final answer
    x = 424,655.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.