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Finding the Fourth Proportional to 723,580.76, 998,602.78 and 401,394.66

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Solution

The fourth proportional to 723,580.76, 998,602.78 and 401,394.66 is: 553,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,580.76 : 998,602.78 = 401,394.66 : x
  2. Step 2: Convert to fraction form
    723,580.76/998,602.78 = 401,394.66/x
  3. Step 3: Cross multiply
    723,580.76x = 998,602.78 × 401,394.66
  4. Step 4: Simplify right side
    723,580.76x = 400,833,819,357.52
  5. Step 5: Solve for x
    x = 400,833,819,357.52/723,580.76
  6. Step 6: Final answer
    x = 553,958.65

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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.