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Finding the Fourth Proportional to 978,231.80, 1,467,347.70 and 891,626.60

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Solution

The fourth proportional to 978,231.80, 1,467,347.70 and 891,626.60 is: 1,337,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,231.80 : 1,467,347.70 = 891,626.60 : x
  2. Step 2: Convert to fraction form
    978,231.80/1,467,347.70 = 891,626.60/x
  3. Step 3: Cross multiply
    978,231.80x = 1,467,347.70 × 891,626.60
  4. Step 4: Simplify right side
    978,231.80x = 1,308,326,240,768.82
  5. Step 5: Solve for x
    x = 1,308,326,240,768.82/978,231.80
  6. Step 6: Final answer
    x = 1,337,439.90

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1.5x scale

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.