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Finding the Fourth Proportional to 317,658.66, 438,383.25 and 190,331.52

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Solution

The fourth proportional to 317,658.66, 438,383.25 and 190,331.52 is: 262,666.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,658.66 : 438,383.25 = 190,331.52 : x
  2. Step 2: Convert to fraction form
    317,658.66/438,383.25 = 190,331.52/x
  3. Step 3: Cross multiply
    317,658.66x = 438,383.25 × 190,331.52
  4. Step 4: Simplify right side
    317,658.66x = 83,438,150,315.04
  5. Step 5: Solve for x
    x = 83,438,150,315.04/317,658.66
  6. Step 6: Final answer
    x = 262,666.07

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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.