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Finding the Fourth Proportional to 371,406.59, 556,740.81 and 221,422.13

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Solution

The fourth proportional to 371,406.59, 556,740.81 and 221,422.13 is: 331,913.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,406.59 : 556,740.81 = 221,422.13 : x
  2. Step 2: Convert to fraction form
    371,406.59/556,740.81 = 221,422.13/x
  3. Step 3: Cross multiply
    371,406.59x = 556,740.81 × 221,422.13
  4. Step 4: Simplify right side
    371,406.59x = 123,274,736,008.13
  5. Step 5: Solve for x
    x = 123,274,736,008.13/371,406.59
  6. Step 6: Final answer
    x = 331,913.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.