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Finding the Fourth Proportional to 723,617.96, 998,665.74 and 401,390.91

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Solution

The fourth proportional to 723,617.96, 998,665.74 and 401,390.91 is: 553,959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,617.96 : 998,665.74 = 401,390.91 : x
  2. Step 2: Convert to fraction form
    723,617.96/998,665.74 = 401,390.91/x
  3. Step 3: Cross multiply
    723,617.96x = 998,665.74 × 401,390.91
  4. Step 4: Simplify right side
    723,617.96x = 400,855,350,164.42
  5. Step 5: Solve for x
    x = 400,855,350,164.42/723,617.96
  6. Step 6: Final answer
    x = 553,959.93

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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.