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Finding the Fourth Proportional to 971,665.16, 1,340,203.73 and 842,372.42

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Solution

The fourth proportional to 971,665.16, 1,340,203.73 and 842,372.42 is: 1,161,872.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,665.16 : 1,340,203.73 = 842,372.42 : x
  2. Step 2: Convert to fraction form
    971,665.16/1,340,203.73 = 842,372.42/x
  3. Step 3: Cross multiply
    971,665.16x = 1,340,203.73 × 842,372.42
  4. Step 4: Simplify right side
    971,665.16x = 1,128,950,648,420.25
  5. Step 5: Solve for x
    x = 1,128,950,648,420.25/971,665.16
  6. Step 6: Final answer
    x = 1,161,872.11

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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.