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Finding the Fourth Proportional to 870.33, 1,305.50 and 525.88

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Solution

The fourth proportional to 870.33, 1,305.50 and 525.88 is: 788.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.33 : 1,305.50 = 525.88 : x
  2. Step 2: Convert to fraction form
    870.33/1,305.50 = 525.88/x
  3. Step 3: Cross multiply
    870.33x = 1,305.50 × 525.88
  4. Step 4: Simplify right side
    870.33x = 686,536.34
  5. Step 5: Solve for x
    x = 686,536.34/870.33
  6. Step 6: Final answer
    x = 788.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.