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Finding the Fourth Proportional to 287,594.40, 431,353.80 and 87,934.80

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Solution

The fourth proportional to 287,594.40, 431,353.80 and 87,934.80 is: 131,890.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,594.40 : 431,353.80 = 87,934.80 : x
  2. Step 2: Convert to fraction form
    287,594.40/431,353.80 = 87,934.80/x
  3. Step 3: Cross multiply
    287,594.40x = 431,353.80 × 87,934.80
  4. Step 4: Simplify right side
    287,594.40x = 37,931,010,132.24
  5. Step 5: Solve for x
    x = 37,931,010,132.24/287,594.40
  6. Step 6: Final answer
    x = 131,890.64

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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.