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Finding the Fourth Proportional to 391,090.08, 586,637.28 and 141,765.60

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Solution

The fourth proportional to 391,090.08, 586,637.28 and 141,765.60 is: 212,649.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,090.08 : 586,637.28 = 141,765.60 : x
  2. Step 2: Convert to fraction form
    391,090.08/586,637.28 = 141,765.60/x
  3. Step 3: Cross multiply
    391,090.08x = 586,637.28 × 141,765.60
  4. Step 4: Simplify right side
    391,090.08x = 83,164,985,981.57
  5. Step 5: Solve for x
    x = 83,164,985,981.57/391,090.08
  6. Step 6: Final answer
    x = 212,649.18

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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.