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Finding the Fourth Proportional to 543,632.20, 815,448.30 and 538,383.40

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Solution

The fourth proportional to 543,632.20, 815,448.30 and 538,383.40 is: 807,575.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,632.20 : 815,448.30 = 538,383.40 : x
  2. Step 2: Convert to fraction form
    543,632.20/815,448.30 = 538,383.40/x
  3. Step 3: Cross multiply
    543,632.20x = 815,448.30 × 538,383.40
  4. Step 4: Simplify right side
    543,632.20x = 439,023,828,278.22
  5. Step 5: Solve for x
    x = 439,023,828,278.22/543,632.20
  6. Step 6: Final answer
    x = 807,575.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.