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Finding the Fourth Proportional to 403,004.71, 556,146.50 and 221,712.76

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Solution

The fourth proportional to 403,004.71, 556,146.50 and 221,712.76 is: 305,963.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,004.71 : 556,146.50 = 221,712.76 : x
  2. Step 2: Convert to fraction form
    403,004.71/556,146.50 = 221,712.76/x
  3. Step 3: Cross multiply
    403,004.71x = 556,146.50 × 221,712.76
  4. Step 4: Simplify right side
    403,004.71x = 123,304,772,980.41
  5. Step 5: Solve for x
    x = 123,304,772,980.41/403,004.71
  6. Step 6: Final answer
    x = 305,963.60

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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.