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Finding the Fourth Proportional to 555.60, 767.60 and 425.28

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Solution

The fourth proportional to 555.60, 767.60 and 425.28 is: 587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.60 : 767.60 = 425.28 : x
  2. Step 2: Convert to fraction form
    555.60/767.60 = 425.28/x
  3. Step 3: Cross multiply
    555.60x = 767.60 × 425.28
  4. Step 4: Simplify right side
    555.60x = 326,444.93
  5. Step 5: Solve for x
    x = 326,444.93/555.60
  6. Step 6: Final answer
    x = 587.55

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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.