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Finding the Fourth Proportional to 287,588.90, 431,345.55 and 87,929.30

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Solution

The fourth proportional to 287,588.90, 431,345.55 and 87,929.30 is: 131,882.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,588.90 : 431,345.55 = 87,929.30 : x
  2. Step 2: Convert to fraction form
    287,588.90/431,345.55 = 87,929.30/x
  3. Step 3: Cross multiply
    287,588.90x = 431,345.55 × 87,929.30
  4. Step 4: Simplify right side
    287,588.90x = 37,927,912,269.62
  5. Step 5: Solve for x
    x = 37,927,912,269.62/287,588.90
  6. Step 6: Final answer
    x = 131,882.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.