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Finding the Fourth Proportional to 260,007.30, 390,010.95 and 126,972.90

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Solution

The fourth proportional to 260,007.30, 390,010.95 and 126,972.90 is: 190,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,007.30 : 390,010.95 = 126,972.90 : x
  2. Step 2: Convert to fraction form
    260,007.30/390,010.95 = 126,972.90/x
  3. Step 3: Cross multiply
    260,007.30x = 390,010.95 × 126,972.90
  4. Step 4: Simplify right side
    260,007.30x = 49,520,821,353.26
  5. Step 5: Solve for x
    x = 49,520,821,353.26/260,007.30
  6. Step 6: Final answer
    x = 190,459.35

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1.5x scale

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.