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Finding the Fourth Proportional to 276,859.60, 415,030.20 and 216,854.80

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Solution

The fourth proportional to 276,859.60, 415,030.20 and 216,854.80 is: 325,079.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,859.60 : 415,030.20 = 216,854.80 : x
  2. Step 2: Convert to fraction form
    276,859.60/415,030.20 = 216,854.80/x
  3. Step 3: Cross multiply
    276,859.60x = 415,030.20 × 216,854.80
  4. Step 4: Simplify right side
    276,859.60x = 90,001,291,014.96
  5. Step 5: Solve for x
    x = 90,001,291,014.96/276,859.60
  6. Step 6: Final answer
    x = 325,079.18

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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.