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Finding the Fourth Proportional to 978,320.40, 1,467,480.60 and 847,100.40

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Solution

The fourth proportional to 978,320.40, 1,467,480.60 and 847,100.40 is: 1,270,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,320.40 : 1,467,480.60 = 847,100.40 : x
  2. Step 2: Convert to fraction form
    978,320.40/1,467,480.60 = 847,100.40/x
  3. Step 3: Cross multiply
    978,320.40x = 1,467,480.60 × 847,100.40
  4. Step 4: Simplify right side
    978,320.40x = 1,243,103,403,252.24
  5. Step 5: Solve for x
    x = 1,243,103,403,252.24/978,320.40
  6. Step 6: Final answer
    x = 1,270,650.60

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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.