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Finding the Fourth Proportional to 978,318.59, 1,350,273.27 and 634,580.51

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Solution

The fourth proportional to 978,318.59, 1,350,273.27 and 634,580.51 is: 875,846.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,318.59 : 1,350,273.27 = 634,580.51 : x
  2. Step 2: Convert to fraction form
    978,318.59/1,350,273.27 = 634,580.51/x
  3. Step 3: Cross multiply
    978,318.59x = 1,350,273.27 × 634,580.51
  4. Step 4: Simplify right side
    978,318.59x = 856,857,090,391.70
  5. Step 5: Solve for x
    x = 856,857,090,391.70/978,318.59
  6. Step 6: Final answer
    x = 875,846.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.