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Finding the Fourth Proportional to 280,681.49, 387,340.39 and 151,619.94

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Solution

The fourth proportional to 280,681.49, 387,340.39 and 151,619.94 is: 209,235.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,681.49 : 387,340.39 = 151,619.94 : x
  2. Step 2: Convert to fraction form
    280,681.49/387,340.39 = 151,619.94/x
  3. Step 3: Cross multiply
    280,681.49x = 387,340.39 × 151,619.94
  4. Step 4: Simplify right side
    280,681.49x = 58,728,526,691.38
  5. Step 5: Solve for x
    x = 58,728,526,691.38/280,681.49
  6. Step 6: Final answer
    x = 209,235.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.