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Finding the Fourth Proportional to 723,868.18, 998,939.28 and 401,578.28

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Solution

The fourth proportional to 723,868.18, 998,939.28 and 401,578.28 is: 554,178.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,868.18 : 998,939.28 = 401,578.28 : x
  2. Step 2: Convert to fraction form
    723,868.18/998,939.28 = 401,578.28/x
  3. Step 3: Cross multiply
    723,868.18x = 998,939.28 × 401,578.28
  4. Step 4: Simplify right side
    723,868.18x = 401,152,317,886.84
  5. Step 5: Solve for x
    x = 401,152,317,886.84/723,868.18
  6. Step 6: Final answer
    x = 554,178.69

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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.