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Finding the Fourth Proportional to 641,070.40, 884,399.16 and 386,276.80

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Solution

The fourth proportional to 641,070.40, 884,399.16 and 386,276.80 is: 532,894.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,070.40 : 884,399.16 = 386,276.80 : x
  2. Step 2: Convert to fraction form
    641,070.40/884,399.16 = 386,276.80/x
  3. Step 3: Cross multiply
    641,070.40x = 884,399.16 × 386,276.80
  4. Step 4: Simplify right side
    641,070.40x = 341,622,877,447.49
  5. Step 5: Solve for x
    x = 341,622,877,447.49/641,070.40
  6. Step 6: Final answer
    x = 532,894.48

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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.