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Finding the Fourth Proportional to 1,347.30, 2,019.42 and 525.15

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Solution

The fourth proportional to 1,347.30, 2,019.42 and 525.15 is: 787.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.30 : 2,019.42 = 525.15 : x
  2. Step 2: Convert to fraction form
    1,347.30/2,019.42 = 525.15/x
  3. Step 3: Cross multiply
    1,347.30x = 2,019.42 × 525.15
  4. Step 4: Simplify right side
    1,347.30x = 1,060,498.41
  5. Step 5: Solve for x
    x = 1,060,498.41/1,347.30
  6. Step 6: Final answer
    x = 787.13

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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.