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Finding the Fourth Proportional to 555.76, 767.52 and 469.12

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Solution

The fourth proportional to 555.76, 767.52 and 469.12 is: 647.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.76 : 767.52 = 469.12 : x
  2. Step 2: Convert to fraction form
    555.76/767.52 = 469.12/x
  3. Step 3: Cross multiply
    555.76x = 767.52 × 469.12
  4. Step 4: Simplify right side
    555.76x = 360,058.98
  5. Step 5: Solve for x
    x = 360,058.98/555.76
  6. Step 6: Final answer
    x = 647.87

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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.