Home / 260,310.20-390,465.30-155,247.80

Finding the Fourth Proportional to 260,310.20, 390,465.30 and 155,247.80

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Solution

The fourth proportional to 260,310.20, 390,465.30 and 155,247.80 is: 232,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,310.20 : 390,465.30 = 155,247.80 : x
  2. Step 2: Convert to fraction form
    260,310.20/390,465.30 = 155,247.80/x
  3. Step 3: Cross multiply
    260,310.20x = 390,465.30 × 155,247.80
  4. Step 4: Simplify right side
    260,310.20x = 60,618,878,801.34
  5. Step 5: Solve for x
    x = 60,618,878,801.34/260,310.20
  6. Step 6: Final answer
    x = 232,871.70

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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.