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Finding the Fourth Proportional to 521,810.48, 720,443.88 and 400,734.51

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Solution

The fourth proportional to 521,810.48, 720,443.88 and 400,734.51 is: 553,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,810.48 : 720,443.88 = 400,734.51 : x
  2. Step 2: Convert to fraction form
    521,810.48/720,443.88 = 400,734.51/x
  3. Step 3: Cross multiply
    521,810.48x = 720,443.88 × 400,734.51
  4. Step 4: Simplify right side
    521,810.48x = 288,706,725,234.30
  5. Step 5: Solve for x
    x = 288,706,725,234.30/521,810.48
  6. Step 6: Final answer
    x = 553,278.90

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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.