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Finding the Fourth Proportional to 528,854.60, 729,815.06 and 287,132.40

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Solution

The fourth proportional to 528,854.60, 729,815.06 and 287,132.40 is: 396,240.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,854.60 : 729,815.06 = 287,132.40 : x
  2. Step 2: Convert to fraction form
    528,854.60/729,815.06 = 287,132.40/x
  3. Step 3: Cross multiply
    528,854.60x = 729,815.06 × 287,132.40
  4. Step 4: Simplify right side
    528,854.60x = 209,553,549,733.94
  5. Step 5: Solve for x
    x = 209,553,549,733.94/528,854.60
  6. Step 6: Final answer
    x = 396,240.38

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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.