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Finding the Fourth Proportional to 763.48, 1,052.50 and 527.40

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Solution

The fourth proportional to 763.48, 1,052.50 and 527.40 is: 727.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.48 : 1,052.50 = 527.40 : x
  2. Step 2: Convert to fraction form
    763.48/1,052.50 = 527.40/x
  3. Step 3: Cross multiply
    763.48x = 1,052.50 × 527.40
  4. Step 4: Simplify right side
    763.48x = 555,088.50
  5. Step 5: Solve for x
    x = 555,088.50/763.48
  6. Step 6: Final answer
    x = 727.05

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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.