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Finding the Fourth Proportional to 487,154.94, 672,269.67 and 280,463.81

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Solution

The fourth proportional to 487,154.94, 672,269.67 and 280,463.81 is: 387,037.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,154.94 : 672,269.67 = 280,463.81 : x
  2. Step 2: Convert to fraction form
    487,154.94/672,269.67 = 280,463.81/x
  3. Step 3: Cross multiply
    487,154.94x = 672,269.67 × 280,463.81
  4. Step 4: Simplify right side
    487,154.94x = 188,547,309,634.29
  5. Step 5: Solve for x
    x = 188,547,309,634.29/487,154.94
  6. Step 6: Final answer
    x = 387,037.66

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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.