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Finding the Fourth Proportional to 641,299.52, 884,218.20 and 518,920.40

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Solution

The fourth proportional to 641,299.52, 884,218.20 and 518,920.40 is: 715,482.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,299.52 : 884,218.20 = 518,920.40 : x
  2. Step 2: Convert to fraction form
    641,299.52/884,218.20 = 518,920.40/x
  3. Step 3: Cross multiply
    641,299.52x = 884,218.20 × 518,920.40
  4. Step 4: Simplify right side
    641,299.52x = 458,838,862,031.28
  5. Step 5: Solve for x
    x = 458,838,862,031.28/641,299.52
  6. Step 6: Final answer
    x = 715,482.93

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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.