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Finding the Fourth Proportional to 978,579.60, 1,467,869.40 and 417,670.80

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Solution

The fourth proportional to 978,579.60, 1,467,869.40 and 417,670.80 is: 626,506.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,579.60 : 1,467,869.40 = 417,670.80 : x
  2. Step 2: Convert to fraction form
    978,579.60/1,467,869.40 = 417,670.80/x
  3. Step 3: Cross multiply
    978,579.60x = 1,467,869.40 × 417,670.80
  4. Step 4: Simplify right side
    978,579.60x = 613,086,186,593.52
  5. Step 5: Solve for x
    x = 613,086,186,593.52/978,579.60
  6. Step 6: Final answer
    x = 626,506.20

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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.