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Finding the Fourth Proportional to 260,447.20, 390,670.80 and 155,384.80

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Solution

The fourth proportional to 260,447.20, 390,670.80 and 155,384.80 is: 233,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,447.20 : 390,670.80 = 155,384.80 : x
  2. Step 2: Convert to fraction form
    260,447.20/390,670.80 = 155,384.80/x
  3. Step 3: Cross multiply
    260,447.20x = 390,670.80 × 155,384.80
  4. Step 4: Simplify right side
    260,447.20x = 60,704,304,123.84
  5. Step 5: Solve for x
    x = 60,704,304,123.84/260,447.20
  6. Step 6: Final answer
    x = 233,077.20

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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.