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Finding the Fourth Proportional to 875.19, 1,207.76 and 525.95

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Solution

The fourth proportional to 875.19, 1,207.76 and 525.95 is: 725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.19 : 1,207.76 = 525.95 : x
  2. Step 2: Convert to fraction form
    875.19/1,207.76 = 525.95/x
  3. Step 3: Cross multiply
    875.19x = 1,207.76 × 525.95
  4. Step 4: Simplify right side
    875.19x = 635,215.33
  5. Step 5: Solve for x
    x = 635,215.33/875.19
  6. Step 6: Final answer
    x = 725.80

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Double scale
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1.5x scale

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.