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Finding the Fourth Proportional to 978,133.32, 1,467,200.79 and 787,700.70

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Solution

The fourth proportional to 978,133.32, 1,467,200.79 and 787,700.70 is: 1,181,551.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,133.32 : 1,467,200.79 = 787,700.70 : x
  2. Step 2: Convert to fraction form
    978,133.32/1,467,200.79 = 787,700.70/x
  3. Step 3: Cross multiply
    978,133.32x = 1,467,200.79 × 787,700.70
  4. Step 4: Simplify right side
    978,133.32x = 1,155,715,089,323.55
  5. Step 5: Solve for x
    x = 1,155,715,089,323.55/978,133.32
  6. Step 6: Final answer
    x = 1,181,551.70

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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.