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Finding the Fourth Proportional to 528,901.38, 729,863.97 and 287,178.72

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Solution

The fourth proportional to 528,901.38, 729,863.97 and 287,178.72 is: 396,295.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,901.38 : 729,863.97 = 287,178.72 : x
  2. Step 2: Convert to fraction form
    528,901.38/729,863.97 = 287,178.72/x
  3. Step 3: Cross multiply
    528,901.38x = 729,863.97 × 287,178.72
  4. Step 4: Simplify right side
    528,901.38x = 209,601,400,678.72
  5. Step 5: Solve for x
    x = 209,601,400,678.72/528,901.38
  6. Step 6: Final answer
    x = 396,295.81

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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.