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Finding the Fourth Proportional to 815,854.40, 1,221,362.40 and 606,420.80

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Solution

The fourth proportional to 815,854.40, 1,221,362.40 and 606,420.80 is: 907,833.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,854.40 : 1,221,362.40 = 606,420.80 : x
  2. Step 2: Convert to fraction form
    815,854.40/1,221,362.40 = 606,420.80/x
  3. Step 3: Cross multiply
    815,854.40x = 1,221,362.40 × 606,420.80
  4. Step 4: Simplify right side
    815,854.40x = 740,659,563,697.92
  5. Step 5: Solve for x
    x = 740,659,563,697.92/815,854.40
  6. Step 6: Final answer
    x = 907,833.02

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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.