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Finding the Fourth Proportional to 978,388.60, 1,467,655.80 and 347,220.40

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Solution

The fourth proportional to 978,388.60, 1,467,655.80 and 347,220.40 is: 520,856.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,388.60 : 1,467,655.80 = 347,220.40 : x
  2. Step 2: Convert to fraction form
    978,388.60/1,467,655.80 = 347,220.40/x
  3. Step 3: Cross multiply
    978,388.60x = 1,467,655.80 × 347,220.40
  4. Step 4: Simplify right side
    978,388.60x = 509,600,033,938.32
  5. Step 5: Solve for x
    x = 509,600,033,938.32/978,388.60
  6. Step 6: Final answer
    x = 520,856.47

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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.