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Finding the Fourth Proportional to 801.95, 1,106.72 and 470.39

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Solution

The fourth proportional to 801.95, 1,106.72 and 470.39 is: 649.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.95 : 1,106.72 = 470.39 : x
  2. Step 2: Convert to fraction form
    801.95/1,106.72 = 470.39/x
  3. Step 3: Cross multiply
    801.95x = 1,106.72 × 470.39
  4. Step 4: Simplify right side
    801.95x = 520,582.14
  5. Step 5: Solve for x
    x = 520,582.14/801.95
  6. Step 6: Final answer
    x = 649.15

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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.