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Finding the Fourth Proportional to 761.61, 1,051.09 and 430.11

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Solution

The fourth proportional to 761.61, 1,051.09 and 430.11 is: 593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.61 : 1,051.09 = 430.11 : x
  2. Step 2: Convert to fraction form
    761.61/1,051.09 = 430.11/x
  3. Step 3: Cross multiply
    761.61x = 1,051.09 × 430.11
  4. Step 4: Simplify right side
    761.61x = 452,084.80
  5. Step 5: Solve for x
    x = 452,084.80/761.61
  6. Step 6: Final answer
    x = 593.59

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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.