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Finding the Fourth Proportional to 1,285,719.02, 1,928,848.25 and 486,982.88

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Solution

The fourth proportional to 1,285,719.02, 1,928,848.25 and 486,982.88 is: 730,576.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,719.02 : 1,928,848.25 = 486,982.88 : x
  2. Step 2: Convert to fraction form
    1,285,719.02/1,928,848.25 = 486,982.88/x
  3. Step 3: Cross multiply
    1,285,719.02x = 1,928,848.25 × 486,982.88
  4. Step 4: Simplify right side
    1,285,719.02x = 939,316,075,867.96
  5. Step 5: Solve for x
    x = 939,316,075,867.96/1,285,719.02
  6. Step 6: Final answer
    x = 730,576.48

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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.