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Finding the Fourth Proportional to 1,470.91, 2,029.86 and 807.76

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Solution

The fourth proportional to 1,470.91, 2,029.86 and 807.76 is: 1,114.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.91 : 2,029.86 = 807.76 : x
  2. Step 2: Convert to fraction form
    1,470.91/2,029.86 = 807.76/x
  3. Step 3: Cross multiply
    1,470.91x = 2,029.86 × 807.76
  4. Step 4: Simplify right side
    1,470.91x = 1,639,639.71
  5. Step 5: Solve for x
    x = 1,639,639.71/1,470.91
  6. Step 6: Final answer
    x = 1,114.71

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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.