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Finding the Fourth Proportional to 723,809.40, 998,889.72 and 401,519.70

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Solution

The fourth proportional to 723,809.40, 998,889.72 and 401,519.70 is: 554,115.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,809.40 : 998,889.72 = 401,519.70 : x
  2. Step 2: Convert to fraction form
    723,809.40/998,889.72 = 401,519.70/x
  3. Step 3: Cross multiply
    723,809.40x = 998,889.72 × 401,519.70
  4. Step 4: Simplify right side
    723,809.40x = 401,073,900,707.48
  5. Step 5: Solve for x
    x = 401,073,900,707.48/723,809.40
  6. Step 6: Final answer
    x = 554,115.35

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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.