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Finding the Fourth Proportional to 881,209.76, 1,216,076.88 and 478,801.76

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Solution

The fourth proportional to 881,209.76, 1,216,076.88 and 478,801.76 is: 660,750.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,209.76 : 1,216,076.88 = 478,801.76 : x
  2. Step 2: Convert to fraction form
    881,209.76/1,216,076.88 = 478,801.76/x
  3. Step 3: Cross multiply
    881,209.76x = 1,216,076.88 × 478,801.76
  4. Step 4: Simplify right side
    881,209.76x = 582,259,750,439.31
  5. Step 5: Solve for x
    x = 582,259,750,439.31/881,209.76
  6. Step 6: Final answer
    x = 660,750.46

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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.