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Finding the Fourth Proportional to 535,685.12, 739,181.76 and 317,859.20

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Solution

The fourth proportional to 535,685.12, 739,181.76 and 317,859.20 is: 438,607.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,685.12 : 739,181.76 = 317,859.20 : x
  2. Step 2: Convert to fraction form
    535,685.12/739,181.76 = 317,859.20/x
  3. Step 3: Cross multiply
    535,685.12x = 739,181.76 × 317,859.20
  4. Step 4: Simplify right side
    535,685.12x = 234,955,722,888.19
  5. Step 5: Solve for x
    x = 234,955,722,888.19/535,685.12
  6. Step 6: Final answer
    x = 438,607.90

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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.