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Finding the Fourth Proportional to 317,448.57, 438,091.65 and 174,213.78

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Solution

The fourth proportional to 317,448.57, 438,091.65 and 174,213.78 is: 240,421.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,448.57 : 438,091.65 = 174,213.78 : x
  2. Step 2: Convert to fraction form
    317,448.57/438,091.65 = 174,213.78/x
  3. Step 3: Cross multiply
    317,448.57x = 438,091.65 × 174,213.78
  4. Step 4: Simplify right side
    317,448.57x = 76,321,602,332.94
  5. Step 5: Solve for x
    x = 76,321,602,332.94/317,448.57
  6. Step 6: Final answer
    x = 240,421.94

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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.