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Finding the Fourth Proportional to 1,294,145.10, 1,941,217.65 and 815,848.20

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Solution

The fourth proportional to 1,294,145.10, 1,941,217.65 and 815,848.20 is: 1,223,772.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,145.10 : 1,941,217.65 = 815,848.20 : x
  2. Step 2: Convert to fraction form
    1,294,145.10/1,941,217.65 = 815,848.20/x
  3. Step 3: Cross multiply
    1,294,145.10x = 1,941,217.65 × 815,848.20
  4. Step 4: Simplify right side
    1,294,145.10x = 1,583,738,925,560.73
  5. Step 5: Solve for x
    x = 1,583,738,925,560.73/1,294,145.10
  6. Step 6: Final answer
    x = 1,223,772.30

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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.