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Finding the Fourth Proportional to 342,945.72, 473,389.30 and 279,172.76

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Solution

The fourth proportional to 342,945.72, 473,389.30 and 279,172.76 is: 385,359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,945.72 : 473,389.30 = 279,172.76 : x
  2. Step 2: Convert to fraction form
    342,945.72/473,389.30 = 279,172.76/x
  3. Step 3: Cross multiply
    342,945.72x = 473,389.30 × 279,172.76
  4. Step 4: Simplify right side
    342,945.72x = 132,157,397,435.47
  5. Step 5: Solve for x
    x = 132,157,397,435.47/342,945.72
  6. Step 6: Final answer
    x = 385,359.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.