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Finding the Fourth Proportional to 287,732.60, 431,598.90 and 228,246.20

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Solution

The fourth proportional to 287,732.60, 431,598.90 and 228,246.20 is: 342,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,732.60 : 431,598.90 = 228,246.20 : x
  2. Step 2: Convert to fraction form
    287,732.60/431,598.90 = 228,246.20/x
  3. Step 3: Cross multiply
    287,732.60x = 431,598.90 × 228,246.20
  4. Step 4: Simplify right side
    287,732.60x = 98,510,808,849.18
  5. Step 5: Solve for x
    x = 98,510,808,849.18/287,732.60
  6. Step 6: Final answer
    x = 342,369.30

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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.