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Finding the Fourth Proportional to 661,125.96, 991,688.94 and 436,433.76

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Solution

The fourth proportional to 661,125.96, 991,688.94 and 436,433.76 is: 654,650.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,125.96 : 991,688.94 = 436,433.76 : x
  2. Step 2: Convert to fraction form
    661,125.96/991,688.94 = 436,433.76/x
  3. Step 3: Cross multiply
    661,125.96x = 991,688.94 × 436,433.76
  4. Step 4: Simplify right side
    661,125.96x = 432,806,532,834.61
  5. Step 5: Solve for x
    x = 432,806,532,834.61/661,125.96
  6. Step 6: Final answer
    x = 654,650.64

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Double scale
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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.