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Finding the Fourth Proportional to 528,960.16, 729,970.96 and 287,245.60

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Solution

The fourth proportional to 528,960.16, 729,970.96 and 287,245.60 is: 396,402.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,960.16 : 729,970.96 = 287,245.60 : x
  2. Step 2: Convert to fraction form
    528,960.16/729,970.96 = 287,245.60/x
  3. Step 3: Cross multiply
    528,960.16x = 729,970.96 × 287,245.60
  4. Step 4: Simplify right side
    528,960.16x = 209,680,946,387.78
  5. Step 5: Solve for x
    x = 209,680,946,387.78/528,960.16
  6. Step 6: Final answer
    x = 396,402.15

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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.