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Finding the Fourth Proportional to 521,810.23, 720,443.54 and 400,734.26

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Solution

The fourth proportional to 521,810.23, 720,443.54 and 400,734.26 is: 553,278.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,810.23 : 720,443.54 = 400,734.26 : x
  2. Step 2: Convert to fraction form
    521,810.23/720,443.54 = 400,734.26/x
  3. Step 3: Cross multiply
    521,810.23x = 720,443.54 × 400,734.26
  4. Step 4: Simplify right side
    521,810.23x = 288,706,406,870.01
  5. Step 5: Solve for x
    x = 288,706,406,870.01/521,810.23
  6. Step 6: Final answer
    x = 553,278.55

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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.