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Finding the Fourth Proportional to 426,312.60, 639,468.96 and 216,010.68

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Solution

The fourth proportional to 426,312.60, 639,468.96 and 216,010.68 is: 324,016.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,312.60 : 639,468.96 = 216,010.68 : x
  2. Step 2: Convert to fraction form
    426,312.60/639,468.96 = 216,010.68/x
  3. Step 3: Cross multiply
    426,312.60x = 639,468.96 × 216,010.68
  4. Step 4: Simplify right side
    426,312.60x = 138,132,124,888.49
  5. Step 5: Solve for x
    x = 138,132,124,888.49/426,312.60
  6. Step 6: Final answer
    x = 324,016.05

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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.