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Finding the Fourth Proportional to 711,515.34, 981,909.54 and 389,239.02

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Solution

The fourth proportional to 711,515.34, 981,909.54 and 389,239.02 is: 537,159.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,515.34 : 981,909.54 = 389,239.02 : x
  2. Step 2: Convert to fraction form
    711,515.34/981,909.54 = 389,239.02/x
  3. Step 3: Cross multiply
    711,515.34x = 981,909.54 × 389,239.02
  4. Step 4: Simplify right side
    711,515.34x = 382,197,507,078.25
  5. Step 5: Solve for x
    x = 382,197,507,078.25/711,515.34
  6. Step 6: Final answer
    x = 537,159.90

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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.