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Finding the Fourth Proportional to 1,470.35, 2,029.09 and 807.21

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Solution

The fourth proportional to 1,470.35, 2,029.09 and 807.21 is: 1,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.35 : 2,029.09 = 807.21 : x
  2. Step 2: Convert to fraction form
    1,470.35/2,029.09 = 807.21/x
  3. Step 3: Cross multiply
    1,470.35x = 2,029.09 × 807.21
  4. Step 4: Simplify right side
    1,470.35x = 1,637,901.74
  5. Step 5: Solve for x
    x = 1,637,901.74/1,470.35
  6. Step 6: Final answer
    x = 1,113.95

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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.