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Finding the Fourth Proportional to 1,295,215.90, 1,942,823.85 and 917,302.30

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Solution

The fourth proportional to 1,295,215.90, 1,942,823.85 and 917,302.30 is: 1,375,953.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295,215.90 : 1,942,823.85 = 917,302.30 : x
  2. Step 2: Convert to fraction form
    1,295,215.90/1,942,823.85 = 917,302.30/x
  3. Step 3: Cross multiply
    1,295,215.90x = 1,942,823.85 × 917,302.30
  4. Step 4: Simplify right side
    1,295,215.90x = 1,782,156,786,099.86
  5. Step 5: Solve for x
    x = 1,782,156,786,099.86/1,295,215.90
  6. Step 6: Final answer
    x = 1,375,953.45

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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.