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Finding the Fourth Proportional to 875.16, 1,207.78 and 609.62

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Solution

The fourth proportional to 875.16, 1,207.78 and 609.62 is: 841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.16 : 1,207.78 = 609.62 : x
  2. Step 2: Convert to fraction form
    875.16/1,207.78 = 609.62/x
  3. Step 3: Cross multiply
    875.16x = 1,207.78 × 609.62
  4. Step 4: Simplify right side
    875.16x = 736,279.28
  5. Step 5: Solve for x
    x = 736,279.28/875.16
  6. Step 6: Final answer
    x = 841.31

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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.