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Finding the Fourth Proportional to 317,478.88, 438,106.80 and 174,239.20

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Solution

The fourth proportional to 317,478.88, 438,106.80 and 174,239.20 is: 240,442.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,478.88 : 438,106.80 = 174,239.20 : x
  2. Step 2: Convert to fraction form
    317,478.88/438,106.80 = 174,239.20/x
  3. Step 3: Cross multiply
    317,478.88x = 438,106.80 × 174,239.20
  4. Step 4: Simplify right side
    317,478.88x = 76,335,378,346.56
  5. Step 5: Solve for x
    x = 76,335,378,346.56/317,478.88
  6. Step 6: Final answer
    x = 240,442.38

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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.