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Finding the Fourth Proportional to 287,907.40, 431,861.10 and 88,226.20

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Solution

The fourth proportional to 287,907.40, 431,861.10 and 88,226.20 is: 132,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,907.40 : 431,861.10 = 88,226.20 : x
  2. Step 2: Convert to fraction form
    287,907.40/431,861.10 = 88,226.20/x
  3. Step 3: Cross multiply
    287,907.40x = 431,861.10 × 88,226.20
  4. Step 4: Simplify right side
    287,907.40x = 38,101,463,780.82
  5. Step 5: Solve for x
    x = 38,101,463,780.82/287,907.40
  6. Step 6: Final answer
    x = 132,339.30

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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.