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Finding the Fourth Proportional to 761.74, 1,051.20 and 430.15

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Solution

The fourth proportional to 761.74, 1,051.20 and 430.15 is: 593.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.74 : 1,051.20 = 430.15 : x
  2. Step 2: Convert to fraction form
    761.74/1,051.20 = 430.15/x
  3. Step 3: Cross multiply
    761.74x = 1,051.20 × 430.15
  4. Step 4: Simplify right side
    761.74x = 452,173.68
  5. Step 5: Solve for x
    x = 452,173.68/761.74
  6. Step 6: Final answer
    x = 593.61

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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.