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Finding the Fourth Proportional to 615,240.20, 921,866.70 and 348,206.60

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Solution

The fourth proportional to 615,240.20, 921,866.70 and 348,206.60 is: 521,747.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,240.20 : 921,866.70 = 348,206.60 : x
  2. Step 2: Convert to fraction form
    615,240.20/921,866.70 = 348,206.60/x
  3. Step 3: Cross multiply
    615,240.20x = 921,866.70 × 348,206.60
  4. Step 4: Simplify right side
    615,240.20x = 321,000,069,260.22
  5. Step 5: Solve for x
    x = 321,000,069,260.22/615,240.20
  6. Step 6: Final answer
    x = 521,747.55

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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.