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Finding the Fourth Proportional to 393,695.19, 543,388.23 and 240,860.79

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Solution

The fourth proportional to 393,695.19, 543,388.23 and 240,860.79 is: 332,442.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,695.19 : 543,388.23 = 240,860.79 : x
  2. Step 2: Convert to fraction form
    393,695.19/543,388.23 = 240,860.79/x
  3. Step 3: Cross multiply
    393,695.19x = 543,388.23 × 240,860.79
  4. Step 4: Simplify right side
    393,695.19x = 130,880,918,354.50
  5. Step 5: Solve for x
    x = 130,880,918,354.50/393,695.19
  6. Step 6: Final answer
    x = 332,442.26

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Double scale
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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.