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Finding the Fourth Proportional to 1,235.66, 1,852.57 and 870.24

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Solution

The fourth proportional to 1,235.66, 1,852.57 and 870.24 is: 1,304.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.66 : 1,852.57 = 870.24 : x
  2. Step 2: Convert to fraction form
    1,235.66/1,852.57 = 870.24/x
  3. Step 3: Cross multiply
    1,235.66x = 1,852.57 × 870.24
  4. Step 4: Simplify right side
    1,235.66x = 1,612,188.55
  5. Step 5: Solve for x
    x = 1,612,188.55/1,235.66
  6. Step 6: Final answer
    x = 1,304.72

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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.