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Finding the Fourth Proportional to 510.32, 761.56 and 455.64

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Solution

The fourth proportional to 510.32, 761.56 and 455.64 is: 679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.32 : 761.56 = 455.64 : x
  2. Step 2: Convert to fraction form
    510.32/761.56 = 455.64/x
  3. Step 3: Cross multiply
    510.32x = 761.56 × 455.64
  4. Step 4: Simplify right side
    510.32x = 346,997.20
  5. Step 5: Solve for x
    x = 346,997.20/510.32
  6. Step 6: Final answer
    x = 679.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.