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Finding the Fourth Proportional to 578,426.85, 866,510.31 and 398,480.49

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Solution

The fourth proportional to 578,426.85, 866,510.31 and 398,480.49 is: 596,942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,426.85 : 866,510.31 = 398,480.49 : x
  2. Step 2: Convert to fraction form
    578,426.85/866,510.31 = 398,480.49/x
  3. Step 3: Cross multiply
    578,426.85x = 866,510.31 × 398,480.49
  4. Step 4: Simplify right side
    578,426.85x = 345,287,452,918.85
  5. Step 5: Solve for x
    x = 345,287,452,918.85/578,426.85
  6. Step 6: Final answer
    x = 596,942.30

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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.