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Finding the Fourth Proportional to 840.71, 1,160.06 and 525.83

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Solution

The fourth proportional to 840.71, 1,160.06 and 525.83 is: 725.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.71 : 1,160.06 = 525.83 : x
  2. Step 2: Convert to fraction form
    840.71/1,160.06 = 525.83/x
  3. Step 3: Cross multiply
    840.71x = 1,160.06 × 525.83
  4. Step 4: Simplify right side
    840.71x = 609,985.92
  5. Step 5: Solve for x
    x = 609,985.92/840.71
  6. Step 6: Final answer
    x = 725.56

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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.