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Finding the Fourth Proportional to 469,907.78, 648,487.20 and 276,280.36

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Solution

The fourth proportional to 469,907.78, 648,487.20 and 276,280.36 is: 381,275.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,907.78 : 648,487.20 = 276,280.36 : x
  2. Step 2: Convert to fraction form
    469,907.78/648,487.20 = 276,280.36/x
  3. Step 3: Cross multiply
    469,907.78x = 648,487.20 × 276,280.36
  4. Step 4: Simplify right side
    469,907.78x = 179,164,275,450.17
  5. Step 5: Solve for x
    x = 179,164,275,450.17/469,907.78
  6. Step 6: Final answer
    x = 381,275.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.