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Finding the Fourth Proportional to 287,356.30, 431,034.45 and 112,252.30

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Solution

The fourth proportional to 287,356.30, 431,034.45 and 112,252.30 is: 168,378.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,356.30 : 431,034.45 = 112,252.30 : x
  2. Step 2: Convert to fraction form
    287,356.30/431,034.45 = 112,252.30/x
  3. Step 3: Cross multiply
    287,356.30x = 431,034.45 × 112,252.30
  4. Step 4: Simplify right side
    287,356.30x = 48,384,608,391.74
  5. Step 5: Solve for x
    x = 48,384,608,391.74/287,356.30
  6. Step 6: Final answer
    x = 168,378.45

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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.