Home / 678,806.40-1,018,209.60-674,659.20

Finding the Fourth Proportional to 678,806.40, 1,018,209.60 and 674,659.20

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Solution

The fourth proportional to 678,806.40, 1,018,209.60 and 674,659.20 is: 1,011,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,806.40 : 1,018,209.60 = 674,659.20 : x
  2. Step 2: Convert to fraction form
    678,806.40/1,018,209.60 = 674,659.20/x
  3. Step 3: Cross multiply
    678,806.40x = 1,018,209.60 × 674,659.20
  4. Step 4: Simplify right side
    678,806.40x = 686,944,474,168.32
  5. Step 5: Solve for x
    x = 686,944,474,168.32/678,806.40
  6. Step 6: Final answer
    x = 1,011,988.80

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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.