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Finding the Fourth Proportional to 542,072.30, 748,039.59 and 312,639.20

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Solution

The fourth proportional to 542,072.30, 748,039.59 and 312,639.20 is: 431,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,072.30 : 748,039.59 = 312,639.20 : x
  2. Step 2: Convert to fraction form
    542,072.30/748,039.59 = 312,639.20/x
  3. Step 3: Cross multiply
    542,072.30x = 748,039.59 × 312,639.20
  4. Step 4: Simplify right side
    542,072.30x = 233,866,495,245.73
  5. Step 5: Solve for x
    x = 233,866,495,245.73/542,072.30
  6. Step 6: Final answer
    x = 431,430.45

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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.