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Finding the Fourth Proportional to 762.17, 1,051.68 and 430.55

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Solution

The fourth proportional to 762.17, 1,051.68 and 430.55 is: 594.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.17 : 1,051.68 = 430.55 : x
  2. Step 2: Convert to fraction form
    762.17/1,051.68 = 430.55/x
  3. Step 3: Cross multiply
    762.17x = 1,051.68 × 430.55
  4. Step 4: Simplify right side
    762.17x = 452,800.82
  5. Step 5: Solve for x
    x = 452,800.82/762.17
  6. Step 6: Final answer
    x = 594.09

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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.