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Finding the Fourth Proportional to 260,135.70, 390,276.45 and 127,020.30

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Solution

The fourth proportional to 260,135.70, 390,276.45 and 127,020.30 is: 190,566.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,135.70 : 390,276.45 = 127,020.30 : x
  2. Step 2: Convert to fraction form
    260,135.70/390,276.45 = 127,020.30/x
  3. Step 3: Cross multiply
    260,135.70x = 390,276.45 × 127,020.30
  4. Step 4: Simplify right side
    260,135.70x = 49,573,031,761.94
  5. Step 5: Solve for x
    x = 49,573,031,761.94/260,135.70
  6. Step 6: Final answer
    x = 190,566.05

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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.