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Finding the Fourth Proportional to 761.37, 1,050.30 and 525.55

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Solution

The fourth proportional to 761.37, 1,050.30 and 525.55 is: 724.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.37 : 1,050.30 = 525.55 : x
  2. Step 2: Convert to fraction form
    761.37/1,050.30 = 525.55/x
  3. Step 3: Cross multiply
    761.37x = 1,050.30 × 525.55
  4. Step 4: Simplify right side
    761.37x = 551,985.17
  5. Step 5: Solve for x
    x = 551,985.17/761.37
  6. Step 6: Final answer
    x = 724.99

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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.