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Finding the Fourth Proportional to 720,058.74, 993,684.57 and 393,376.29

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Solution

The fourth proportional to 720,058.74, 993,684.57 and 393,376.29 is: 542,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,058.74 : 993,684.57 = 393,376.29 : x
  2. Step 2: Convert to fraction form
    720,058.74/993,684.57 = 393,376.29/x
  3. Step 3: Cross multiply
    720,058.74x = 993,684.57 × 393,376.29
  4. Step 4: Simplify right side
    720,058.74x = 390,891,949,576.85
  5. Step 5: Solve for x
    x = 390,891,949,576.85/720,058.74
  6. Step 6: Final answer
    x = 542,861.20

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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.