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Finding the Fourth Proportional to 710,475.18, 980,332.11 and 423,978.18

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Solution

The fourth proportional to 710,475.18, 980,332.11 and 423,978.18 is: 585,016.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,475.18 : 980,332.11 = 423,978.18 : x
  2. Step 2: Convert to fraction form
    710,475.18/980,332.11 = 423,978.18/x
  3. Step 3: Cross multiply
    710,475.18x = 980,332.11 × 423,978.18
  4. Step 4: Simplify right side
    710,475.18x = 415,639,423,793.36
  5. Step 5: Solve for x
    x = 415,639,423,793.36/710,475.18
  6. Step 6: Final answer
    x = 585,016.11

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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.