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Finding the Fourth Proportional to 444,390.78, 666,686.18 and 140,803.20

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Solution

The fourth proportional to 444,390.78, 666,686.18 and 140,803.20 is: 211,236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,390.78 : 666,686.18 = 140,803.20 : x
  2. Step 2: Convert to fraction form
    444,390.78/666,686.18 = 140,803.20/x
  3. Step 3: Cross multiply
    444,390.78x = 666,686.18 × 140,803.20
  4. Step 4: Simplify right side
    444,390.78x = 93,871,547,539.78
  5. Step 5: Solve for x
    x = 93,871,547,539.78/444,390.78
  6. Step 6: Final answer
    x = 211,236.49

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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.