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Finding the Fourth Proportional to 875.02, 1,207.28 and 564.70

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Solution

The fourth proportional to 875.02, 1,207.28 and 564.70 is: 779.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.02 : 1,207.28 = 564.70 : x
  2. Step 2: Convert to fraction form
    875.02/1,207.28 = 564.70/x
  3. Step 3: Cross multiply
    875.02x = 1,207.28 × 564.70
  4. Step 4: Simplify right side
    875.02x = 681,751.02
  5. Step 5: Solve for x
    x = 681,751.02/875.02
  6. Step 6: Final answer
    x = 779.13

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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.