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Finding the Fourth Proportional to 615,241.20, 921,868.20 and 348,207.60

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Solution

The fourth proportional to 615,241.20, 921,868.20 and 348,207.60 is: 521,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,241.20 : 921,868.20 = 348,207.60 : x
  2. Step 2: Convert to fraction form
    615,241.20/921,868.20 = 348,207.60/x
  3. Step 3: Cross multiply
    615,241.20x = 921,868.20 × 348,207.60
  4. Step 4: Simplify right side
    615,241.20x = 321,001,513,438.32
  5. Step 5: Solve for x
    x = 321,001,513,438.32/615,241.20
  6. Step 6: Final answer
    x = 521,749.05

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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.