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Finding the Fourth Proportional to 611,358.60, 917,078.40 and 162,073.20

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Solution

The fourth proportional to 611,358.60, 917,078.40 and 162,073.20 is: 243,120.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,358.60 : 917,078.40 = 162,073.20 : x
  2. Step 2: Convert to fraction form
    611,358.60/917,078.40 = 162,073.20/x
  3. Step 3: Cross multiply
    611,358.60x = 917,078.40 × 162,073.20
  4. Step 4: Simplify right side
    611,358.60x = 148,633,830,938.88
  5. Step 5: Solve for x
    x = 148,633,830,938.88/611,358.60
  6. Step 6: Final answer
    x = 243,120.54

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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.