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Finding the Fourth Proportional to 342,371.59, 513,457.05 and 128,985.55

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Solution

The fourth proportional to 342,371.59, 513,457.05 and 128,985.55 is: 193,440.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,371.59 : 513,457.05 = 128,985.55 : x
  2. Step 2: Convert to fraction form
    342,371.59/513,457.05 = 128,985.55/x
  3. Step 3: Cross multiply
    342,371.59x = 513,457.05 × 128,985.55
  4. Step 4: Simplify right side
    342,371.59x = 66,228,539,995.63
  5. Step 5: Solve for x
    x = 66,228,539,995.63/342,371.59
  6. Step 6: Final answer
    x = 193,440.52

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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.