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Finding the Fourth Proportional to 876,164.40, 1,312,403.40 and 728,708.40

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Solution

The fourth proportional to 876,164.40, 1,312,403.40 and 728,708.40 is: 1,091,529.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,164.40 : 1,312,403.40 = 728,708.40 : x
  2. Step 2: Convert to fraction form
    876,164.40/1,312,403.40 = 728,708.40/x
  3. Step 3: Cross multiply
    876,164.40x = 1,312,403.40 × 728,708.40
  4. Step 4: Simplify right side
    876,164.40x = 956,359,381,768.56
  5. Step 5: Solve for x
    x = 956,359,381,768.56/876,164.40
  6. Step 6: Final answer
    x = 1,091,529.61

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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.