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Finding the Fourth Proportional to 317,465.78, 438,111.30 and 174,230.90

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Solution

The fourth proportional to 317,465.78, 438,111.30 and 174,230.90 is: 240,443.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,465.78 : 438,111.30 = 174,230.90 : x
  2. Step 2: Convert to fraction form
    317,465.78/438,111.30 = 174,230.90/x
  3. Step 3: Cross multiply
    317,465.78x = 438,111.30 × 174,230.90
  4. Step 4: Simplify right side
    317,465.78x = 76,332,526,099.17
  5. Step 5: Solve for x
    x = 76,332,526,099.17/317,465.78
  6. Step 6: Final answer
    x = 240,443.32

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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.