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Finding the Fourth Proportional to 631,205.76, 870,486.96 and 493,402.92

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Solution

The fourth proportional to 631,205.76, 870,486.96 and 493,402.92 is: 680,445.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,205.76 : 870,486.96 = 493,402.92 : x
  2. Step 2: Convert to fraction form
    631,205.76/870,486.96 = 493,402.92/x
  3. Step 3: Cross multiply
    631,205.76x = 870,486.96 × 493,402.92
  4. Step 4: Simplify right side
    631,205.76x = 429,500,807,885.92
  5. Step 5: Solve for x
    x = 429,500,807,885.92/631,205.76
  6. Step 6: Final answer
    x = 680,445.01

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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.