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Finding the Fourth Proportional to 426,070.60, 639,101.22 and 292,543.72

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Solution

The fourth proportional to 426,070.60, 639,101.22 and 292,543.72 is: 438,812.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,070.60 : 639,101.22 = 292,543.72 : x
  2. Step 2: Convert to fraction form
    426,070.60/639,101.22 = 292,543.72/x
  3. Step 3: Cross multiply
    426,070.60x = 639,101.22 × 292,543.72
  4. Step 4: Simplify right side
    426,070.60x = 186,965,048,355.34
  5. Step 5: Solve for x
    x = 186,965,048,355.34/426,070.60
  6. Step 6: Final answer
    x = 438,812.37

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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.