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Finding the Fourth Proportional to 521,995.73, 720,701.15 and 400,920.57

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Solution

The fourth proportional to 521,995.73, 720,701.15 and 400,920.57 is: 553,536.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,995.73 : 720,701.15 = 400,920.57 : x
  2. Step 2: Convert to fraction form
    521,995.73/720,701.15 = 400,920.57/x
  3. Step 3: Cross multiply
    521,995.73x = 720,701.15 × 400,920.57
  4. Step 4: Simplify right side
    521,995.73x = 288,943,913,853.05
  5. Step 5: Solve for x
    x = 288,943,913,853.05/521,995.73
  6. Step 6: Final answer
    x = 553,536.94

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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.