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Finding the Fourth Proportional to 678,602.40, 1,018,049.40 and 205,335.60

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Solution

The fourth proportional to 678,602.40, 1,018,049.40 and 205,335.60 is: 308,047.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,602.40 : 1,018,049.40 = 205,335.60 : x
  2. Step 2: Convert to fraction form
    678,602.40/1,018,049.40 = 205,335.60/x
  3. Step 3: Cross multiply
    678,602.40x = 1,018,049.40 × 205,335.60
  4. Step 4: Simplify right side
    678,602.40x = 209,041,784,378.64
  5. Step 5: Solve for x
    x = 209,041,784,378.64/678,602.40
  6. Step 6: Final answer
    x = 308,047.52

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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.