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Finding the Fourth Proportional to 978,812.76, 1,350,458.89 and 570,625.67

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Solution

The fourth proportional to 978,812.76, 1,350,458.89 and 570,625.67 is: 787,286.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,812.76 : 1,350,458.89 = 570,625.67 : x
  2. Step 2: Convert to fraction form
    978,812.76/1,350,458.89 = 570,625.67/x
  3. Step 3: Cross multiply
    978,812.76x = 1,350,458.89 × 570,625.67
  4. Step 4: Simplify right side
    978,812.76x = 770,606,508,913.71
  5. Step 5: Solve for x
    x = 770,606,508,913.71/978,812.76
  6. Step 6: Final answer
    x = 787,286.95

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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.