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Finding the Fourth Proportional to 723,617.77, 998,653.80 and 401,431.63

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Solution

The fourth proportional to 723,617.77, 998,653.80 and 401,431.63 is: 554,009.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,617.77 : 998,653.80 = 401,431.63 : x
  2. Step 2: Convert to fraction form
    723,617.77/998,653.80 = 401,431.63/x
  3. Step 3: Cross multiply
    723,617.77x = 998,653.80 × 401,431.63
  4. Step 4: Simplify right side
    723,617.77x = 400,891,217,746.43
  5. Step 5: Solve for x
    x = 400,891,217,746.43/723,617.77
  6. Step 6: Final answer
    x = 554,009.64

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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.