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Finding the Fourth Proportional to 716,622.99, 988,909.85 and 389,937.27

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Solution

The fourth proportional to 716,622.99, 988,909.85 and 389,937.27 is: 538,097.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,622.99 : 988,909.85 = 389,937.27 : x
  2. Step 2: Convert to fraction form
    716,622.99/988,909.85 = 389,937.27/x
  3. Step 3: Cross multiply
    716,622.99x = 988,909.85 × 389,937.27
  4. Step 4: Simplify right side
    716,622.99x = 385,612,805,235.42
  5. Step 5: Solve for x
    x = 385,612,805,235.42/716,622.99
  6. Step 6: Final answer
    x = 538,097.17

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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.