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Finding the Fourth Proportional to 260,430.68, 390,657.36 and 127,422.92

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Solution

The fourth proportional to 260,430.68, 390,657.36 and 127,422.92 is: 191,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,430.68 : 390,657.36 = 127,422.92 : x
  2. Step 2: Convert to fraction form
    260,430.68/390,657.36 = 127,422.92/x
  3. Step 3: Cross multiply
    260,430.68x = 390,657.36 × 127,422.92
  4. Step 4: Simplify right side
    260,430.68x = 49,778,701,530.69
  5. Step 5: Solve for x
    x = 49,778,701,530.69/260,430.68
  6. Step 6: Final answer
    x = 191,139.93

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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.