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Finding the Fourth Proportional to 641,323.72, 884,641.20 and 423,534.40

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Solution

The fourth proportional to 641,323.72, 884,641.20 and 423,534.40 is: 584,222.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,323.72 : 884,641.20 = 423,534.40 : x
  2. Step 2: Convert to fraction form
    641,323.72/884,641.20 = 423,534.40/x
  3. Step 3: Cross multiply
    641,323.72x = 884,641.20 × 423,534.40
  4. Step 4: Simplify right side
    641,323.72x = 374,675,979,857.28
  5. Step 5: Solve for x
    x = 374,675,979,857.28/641,323.72
  6. Step 6: Final answer
    x = 584,222.86

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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.