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Finding the Fourth Proportional to 260,438.40, 390,074.40 and 155,462.40

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Solution

The fourth proportional to 260,438.40, 390,074.40 and 155,462.40 is: 232,845.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,438.40 : 390,074.40 = 155,462.40 : x
  2. Step 2: Convert to fraction form
    260,438.40/390,074.40 = 155,462.40/x
  3. Step 3: Cross multiply
    260,438.40x = 390,074.40 × 155,462.40
  4. Step 4: Simplify right side
    260,438.40x = 60,641,902,402.56
  5. Step 5: Solve for x
    x = 60,641,902,402.56/260,438.40
  6. Step 6: Final answer
    x = 232,845.47

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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.