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Finding the Fourth Proportional to 317,879.34, 438,478.92 and 188,730.20

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Solution

The fourth proportional to 317,879.34, 438,478.92 and 188,730.20 is: 260,332.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,879.34 : 438,478.92 = 188,730.20 : x
  2. Step 2: Convert to fraction form
    317,879.34/438,478.92 = 188,730.20/x
  3. Step 3: Cross multiply
    317,879.34x = 438,478.92 × 188,730.20
  4. Step 4: Simplify right side
    317,879.34x = 82,754,215,363.58
  5. Step 5: Solve for x
    x = 82,754,215,363.58/317,879.34
  6. Step 6: Final answer
    x = 260,332.16

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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.