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Finding the Fourth Proportional to 342,370.59, 513,455.55 and 128,984.55

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Solution

The fourth proportional to 342,370.59, 513,455.55 and 128,984.55 is: 193,439.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,370.59 : 513,455.55 = 128,984.55 : x
  2. Step 2: Convert to fraction form
    342,370.59/513,455.55 = 128,984.55/x
  3. Step 3: Cross multiply
    342,370.59x = 513,455.55 × 128,984.55
  4. Step 4: Simplify right side
    342,370.59x = 66,227,830,172.01
  5. Step 5: Solve for x
    x = 66,227,830,172.01/342,370.59
  6. Step 6: Final answer
    x = 193,439.01

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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.