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Finding the Fourth Proportional to 268,815.40, 403,223.10 and 185,871.40

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Solution

The fourth proportional to 268,815.40, 403,223.10 and 185,871.40 is: 278,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,815.40 : 403,223.10 = 185,871.40 : x
  2. Step 2: Convert to fraction form
    268,815.40/403,223.10 = 185,871.40/x
  3. Step 3: Cross multiply
    268,815.40x = 403,223.10 × 185,871.40
  4. Step 4: Simplify right side
    268,815.40x = 74,947,642,109.34
  5. Step 5: Solve for x
    x = 74,947,642,109.34/268,815.40
  6. Step 6: Final answer
    x = 278,807.10

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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.