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Finding the Fourth Proportional to 678,953.80, 1,018,430.70 and 605,470.60

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Solution

The fourth proportional to 678,953.80, 1,018,430.70 and 605,470.60 is: 908,205.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,953.80 : 1,018,430.70 = 605,470.60 : x
  2. Step 2: Convert to fraction form
    678,953.80/1,018,430.70 = 605,470.60/x
  3. Step 3: Cross multiply
    678,953.80x = 1,018,430.70 × 605,470.60
  4. Step 4: Simplify right side
    678,953.80x = 616,629,846,987.42
  5. Step 5: Solve for x
    x = 616,629,846,987.42/678,953.80
  6. Step 6: Final answer
    x = 908,205.90

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Similar ratio
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1.5x scale

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.