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Finding the Fourth Proportional to 342,005.70, 513,008.55 and 155,381.70

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Solution

The fourth proportional to 342,005.70, 513,008.55 and 155,381.70 is: 233,072.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,005.70 : 513,008.55 = 155,381.70 : x
  2. Step 2: Convert to fraction form
    342,005.70/513,008.55 = 155,381.70/x
  3. Step 3: Cross multiply
    342,005.70x = 513,008.55 × 155,381.70
  4. Step 4: Simplify right side
    342,005.70x = 79,712,140,613.54
  5. Step 5: Solve for x
    x = 79,712,140,613.54/342,005.70
  6. Step 6: Final answer
    x = 233,072.55

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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.