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Finding the Fourth Proportional to 723,580.40, 998,600.74 and 401,394.40

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Solution

The fourth proportional to 723,580.40, 998,600.74 and 401,394.40 is: 553,957.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,580.40 : 998,600.74 = 401,394.40 : x
  2. Step 2: Convert to fraction form
    723,580.40/998,600.74 = 401,394.40/x
  3. Step 3: Cross multiply
    723,580.40x = 998,600.74 × 401,394.40
  4. Step 4: Simplify right side
    723,580.40x = 400,832,744,871.86
  5. Step 5: Solve for x
    x = 400,832,744,871.86/723,580.40
  6. Step 6: Final answer
    x = 553,957.44

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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.