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Finding the Fourth Proportional to 528,857.80, 729,819.58 and 287,135.47

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Solution

The fourth proportional to 528,857.80, 729,819.58 and 287,135.47 is: 396,244.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,857.80 : 729,819.58 = 287,135.47 : x
  2. Step 2: Convert to fraction form
    528,857.80/729,819.58 = 287,135.47/x
  3. Step 3: Cross multiply
    528,857.80x = 729,819.58 × 287,135.47
  4. Step 4: Simplify right side
    528,857.80x = 209,557,088,118.50
  5. Step 5: Solve for x
    x = 209,557,088,118.50/528,857.80
  6. Step 6: Final answer
    x = 396,244.68

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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.