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Finding the Fourth Proportional to 678,666.80, 1,018,000.20 and 662,920.40

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Solution

The fourth proportional to 678,666.80, 1,018,000.20 and 662,920.40 is: 994,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,666.80 : 1,018,000.20 = 662,920.40 : x
  2. Step 2: Convert to fraction form
    678,666.80/1,018,000.20 = 662,920.40/x
  3. Step 3: Cross multiply
    678,666.80x = 1,018,000.20 × 662,920.40
  4. Step 4: Simplify right side
    678,666.80x = 674,853,099,784.08
  5. Step 5: Solve for x
    x = 674,853,099,784.08/678,666.80
  6. Step 6: Final answer
    x = 994,380.60

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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.