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Finding the Fourth Proportional to 342,000.20, 513,000.30 and 155,376.20

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Solution

The fourth proportional to 342,000.20, 513,000.30 and 155,376.20 is: 233,064.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,000.20 : 513,000.30 = 155,376.20 : x
  2. Step 2: Convert to fraction form
    342,000.20/513,000.30 = 155,376.20/x
  3. Step 3: Cross multiply
    342,000.20x = 513,000.30 × 155,376.20
  4. Step 4: Simplify right side
    342,000.20x = 79,708,037,212.86
  5. Step 5: Solve for x
    x = 79,708,037,212.86/342,000.20
  6. Step 6: Final answer
    x = 233,064.30

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Similar ratio
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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.