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Finding the Fourth Proportional to 287,599.60, 431,034.90 and 109,869.40

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Solution

The fourth proportional to 287,599.60, 431,034.90 and 109,869.40 is: 164,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,599.60 : 431,034.90 = 109,869.40 : x
  2. Step 2: Convert to fraction form
    287,599.60/431,034.90 = 109,869.40/x
  3. Step 3: Cross multiply
    287,599.60x = 431,034.90 × 109,869.40
  4. Step 4: Simplify right side
    287,599.60x = 47,357,545,842.06
  5. Step 5: Solve for x
    x = 47,357,545,842.06/287,599.60
  6. Step 6: Final answer
    x = 164,664.85

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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.