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Finding the Fourth Proportional to 978,285.60, 1,467,428.40 and 907,426.80

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Solution

The fourth proportional to 978,285.60, 1,467,428.40 and 907,426.80 is: 1,361,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,285.60 : 1,467,428.40 = 907,426.80 : x
  2. Step 2: Convert to fraction form
    978,285.60/1,467,428.40 = 907,426.80/x
  3. Step 3: Cross multiply
    978,285.60x = 1,467,428.40 × 907,426.80
  4. Step 4: Simplify right side
    978,285.60x = 1,331,583,857,241.12
  5. Step 5: Solve for x
    x = 1,331,583,857,241.12/978,285.60
  6. Step 6: Final answer
    x = 1,361,140.20

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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.