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Finding the Fourth Proportional to 801.96, 1,106.64 and 470.40

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Solution

The fourth proportional to 801.96, 1,106.64 and 470.40 is: 649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.96 : 1,106.64 = 470.40 : x
  2. Step 2: Convert to fraction form
    801.96/1,106.64 = 470.40/x
  3. Step 3: Cross multiply
    801.96x = 1,106.64 × 470.40
  4. Step 4: Simplify right side
    801.96x = 520,563.46
  5. Step 5: Solve for x
    x = 520,563.46/801.96
  6. Step 6: Final answer
    x = 649.11

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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.