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Finding the Fourth Proportional to 978,459.80, 1,467,689.70 and 605,211.80

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Solution

The fourth proportional to 978,459.80, 1,467,689.70 and 605,211.80 is: 907,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,459.80 : 1,467,689.70 = 605,211.80 : x
  2. Step 2: Convert to fraction form
    978,459.80/1,467,689.70 = 605,211.80/x
  3. Step 3: Cross multiply
    978,459.80x = 1,467,689.70 × 605,211.80
  4. Step 4: Simplify right side
    978,459.80x = 888,263,125,178.46
  5. Step 5: Solve for x
    x = 888,263,125,178.46/978,459.80
  6. Step 6: Final answer
    x = 907,817.70

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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.