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Finding the Fourth Proportional to 402,648.65, 555,655.49 and 221,363.66

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Solution

The fourth proportional to 402,648.65, 555,655.49 and 221,363.66 is: 305,482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,648.65 : 555,655.49 = 221,363.66 : x
  2. Step 2: Convert to fraction form
    402,648.65/555,655.49 = 221,363.66/x
  3. Step 3: Cross multiply
    402,648.65x = 555,655.49 × 221,363.66
  4. Step 4: Simplify right side
    402,648.65x = 123,001,932,412.08
  5. Step 5: Solve for x
    x = 123,001,932,412.08/402,648.65
  6. Step 6: Final answer
    x = 305,482.05

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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.