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Finding the Fourth Proportional to 710,199.38, 980,068.68 and 387,909.39

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Solution

The fourth proportional to 710,199.38, 980,068.68 and 387,909.39 is: 535,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,199.38 : 980,068.68 = 387,909.39 : x
  2. Step 2: Convert to fraction form
    710,199.38/980,068.68 = 387,909.39/x
  3. Step 3: Cross multiply
    710,199.38x = 980,068.68 × 387,909.39
  4. Step 4: Simplify right side
    710,199.38x = 380,177,843,816.91
  5. Step 5: Solve for x
    x = 380,177,843,816.91/710,199.38
  6. Step 6: Final answer
    x = 535,311.43

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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.