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Finding the Fourth Proportional to 306,634.80, 423,155.40 and 172,498.80

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Solution

The fourth proportional to 306,634.80, 423,155.40 and 172,498.80 is: 238,047.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,634.80 : 423,155.40 = 172,498.80 : x
  2. Step 2: Convert to fraction form
    306,634.80/423,155.40 = 172,498.80/x
  3. Step 3: Cross multiply
    306,634.80x = 423,155.40 × 172,498.80
  4. Step 4: Simplify right side
    306,634.80x = 72,993,798,713.52
  5. Step 5: Solve for x
    x = 72,993,798,713.52/306,634.80
  6. Step 6: Final answer
    x = 238,047.99

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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.