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Finding the Fourth Proportional to 426,634.18, 640,046.72 and 160,397.00

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Solution

The fourth proportional to 426,634.18, 640,046.72 and 160,397.00 is: 240,631.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,634.18 : 640,046.72 = 160,397.00 : x
  2. Step 2: Convert to fraction form
    426,634.18/640,046.72 = 160,397.00/x
  3. Step 3: Cross multiply
    426,634.18x = 640,046.72 × 160,397.00
  4. Step 4: Simplify right side
    426,634.18x = 102,661,574,548.86
  5. Step 5: Solve for x
    x = 102,661,574,548.86/426,634.18
  6. Step 6: Final answer
    x = 240,631.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.