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Finding the Fourth Proportional to 402,326.71, 555,216.99 and 221,042.18

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Solution

The fourth proportional to 402,326.71, 555,216.99 and 221,042.18 is: 305,041.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,326.71 : 555,216.99 = 221,042.18 : x
  2. Step 2: Convert to fraction form
    402,326.71/555,216.99 = 221,042.18/x
  3. Step 3: Cross multiply
    402,326.71x = 555,216.99 × 221,042.18
  4. Step 4: Simplify right side
    402,326.71x = 122,726,371,066.55
  5. Step 5: Solve for x
    x = 122,726,371,066.55/402,326.71
  6. Step 6: Final answer
    x = 305,041.57

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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.