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Finding the Fourth Proportional to 521,805.23, 720,436.64 and 400,729.26

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Solution

The fourth proportional to 521,805.23, 720,436.64 and 400,729.26 is: 553,271.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,805.23 : 720,436.64 = 400,729.26 : x
  2. Step 2: Convert to fraction form
    521,805.23/720,436.64 = 400,729.26/x
  3. Step 3: Cross multiply
    521,805.23x = 720,436.64 × 400,729.26
  4. Step 4: Simplify right side
    521,805.23x = 288,700,039,620.44
  5. Step 5: Solve for x
    x = 288,700,039,620.44/521,805.23
  6. Step 6: Final answer
    x = 553,271.65

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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.