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Finding the Fourth Proportional to 260,614.80, 391,505.40 and 249,987.60

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Solution

The fourth proportional to 260,614.80, 391,505.40 and 249,987.60 is: 375,540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,614.80 : 391,505.40 = 249,987.60 : x
  2. Step 2: Convert to fraction form
    260,614.80/391,505.40 = 249,987.60/x
  3. Step 3: Cross multiply
    260,614.80x = 391,505.40 × 249,987.60
  4. Step 4: Simplify right side
    260,614.80x = 97,871,495,333.04
  5. Step 5: Solve for x
    x = 97,871,495,333.04/260,614.80
  6. Step 6: Final answer
    x = 375,540.82

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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.