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Finding the Fourth Proportional to 278,401.40, 417,602.10 and 207,542.60

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Solution

The fourth proportional to 278,401.40, 417,602.10 and 207,542.60 is: 311,313.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,401.40 : 417,602.10 = 207,542.60 : x
  2. Step 2: Convert to fraction form
    278,401.40/417,602.10 = 207,542.60/x
  3. Step 3: Cross multiply
    278,401.40x = 417,602.10 × 207,542.60
  4. Step 4: Simplify right side
    278,401.40x = 86,670,225,599.46
  5. Step 5: Solve for x
    x = 86,670,225,599.46/278,401.40
  6. Step 6: Final answer
    x = 311,313.90

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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.