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Finding the Fourth Proportional to 875.53, 1,313.34 and 510.13

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Solution

The fourth proportional to 875.53, 1,313.34 and 510.13 is: 765.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.53 : 1,313.34 = 510.13 : x
  2. Step 2: Convert to fraction form
    875.53/1,313.34 = 510.13/x
  3. Step 3: Cross multiply
    875.53x = 1,313.34 × 510.13
  4. Step 4: Simplify right side
    875.53x = 669,974.13
  5. Step 5: Solve for x
    x = 669,974.13/875.53
  6. Step 6: Final answer
    x = 765.22

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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.