Home / 724,122.60-1,086,378.30-645,779.40

Finding the Fourth Proportional to 724,122.60, 1,086,378.30 and 645,779.40

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Solution

The fourth proportional to 724,122.60, 1,086,378.30 and 645,779.40 is: 968,842.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,122.60 : 1,086,378.30 = 645,779.40 : x
  2. Step 2: Convert to fraction form
    724,122.60/1,086,378.30 = 645,779.40/x
  3. Step 3: Cross multiply
    724,122.60x = 1,086,378.30 × 645,779.40
  4. Step 4: Simplify right side
    724,122.60x = 701,560,726,747.02
  5. Step 5: Solve for x
    x = 701,560,726,747.02/724,122.60
  6. Step 6: Final answer
    x = 968,842.47

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1.5x scale

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.