Home / 402,905.53-555,998.02-221,617.45

Finding the Fourth Proportional to 402,905.53, 555,998.02 and 221,617.45

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Solution

The fourth proportional to 402,905.53, 555,998.02 and 221,617.45 is: 305,825.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,905.53 : 555,998.02 = 221,617.45 : x
  2. Step 2: Convert to fraction form
    402,905.53/555,998.02 = 221,617.45/x
  3. Step 3: Cross multiply
    402,905.53x = 555,998.02 × 221,617.45
  4. Step 4: Simplify right side
    402,905.53x = 123,218,863,397.45
  5. Step 5: Solve for x
    x = 123,218,863,397.45/402,905.53
  6. Step 6: Final answer
    x = 305,825.69

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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.