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Finding the Fourth Proportional to 978,448.50, 1,350,261.36 and 570,830.58

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Solution

The fourth proportional to 978,448.50, 1,350,261.36 and 570,830.58 is: 787,747.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,448.50 : 1,350,261.36 = 570,830.58 : x
  2. Step 2: Convert to fraction form
    978,448.50/1,350,261.36 = 570,830.58/x
  3. Step 3: Cross multiply
    978,448.50x = 1,350,261.36 × 570,830.58
  4. Step 4: Simplify right side
    978,448.50x = 770,770,475,280.39
  5. Step 5: Solve for x
    x = 770,770,475,280.39/978,448.50
  6. Step 6: Final answer
    x = 787,747.62

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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.