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Finding the Fourth Proportional to 528,770.32, 729,705 and 287,053.36

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Solution

The fourth proportional to 528,770.32, 729,705 and 287,053.36 is: 396,134.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,770.32 : 729,705 = 287,053.36 : x
  2. Step 2: Convert to fraction form
    528,770.32/729,705 = 287,053.36/x
  3. Step 3: Cross multiply
    528,770.32x = 729,705 × 287,053.36
  4. Step 4: Simplify right side
    528,770.32x = 209,464,272,058.80
  5. Step 5: Solve for x
    x = 209,464,272,058.80/528,770.32
  6. Step 6: Final answer
    x = 396,134.70

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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.