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Finding the Fourth Proportional to 660,691.32, 911,881.80 and 430,849.56

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Solution

The fourth proportional to 660,691.32, 911,881.80 and 430,849.56 is: 594,655.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,691.32 : 911,881.80 = 430,849.56 : x
  2. Step 2: Convert to fraction form
    660,691.32/911,881.80 = 430,849.56/x
  3. Step 3: Cross multiply
    660,691.32x = 911,881.80 × 430,849.56
  4. Step 4: Simplify right side
    660,691.32x = 392,883,872,302.01
  5. Step 5: Solve for x
    x = 392,883,872,302.01/660,691.32
  6. Step 6: Final answer
    x = 594,655.72

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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.