Home / 521,749.80-781,458.30-403,036.20

Finding the Fourth Proportional to 521,749.80, 781,458.30 and 403,036.20

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Solution

The fourth proportional to 521,749.80, 781,458.30 and 403,036.20 is: 603,653.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,749.80 : 781,458.30 = 403,036.20 : x
  2. Step 2: Convert to fraction form
    521,749.80/781,458.30 = 403,036.20/x
  3. Step 3: Cross multiply
    521,749.80x = 781,458.30 × 403,036.20
  4. Step 4: Simplify right side
    521,749.80x = 314,955,983,690.46
  5. Step 5: Solve for x
    x = 314,955,983,690.46/521,749.80
  6. Step 6: Final answer
    x = 603,653.29

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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.