Home / 820,152.70-1,230,423.45-420,855.10

Finding the Fourth Proportional to 820,152.70, 1,230,423.45 and 420,855.10

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Solution

The fourth proportional to 820,152.70, 1,230,423.45 and 420,855.10 is: 631,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,152.70 : 1,230,423.45 = 420,855.10 : x
  2. Step 2: Convert to fraction form
    820,152.70/1,230,423.45 = 420,855.10/x
  3. Step 3: Cross multiply
    820,152.70x = 1,230,423.45 × 420,855.10
  4. Step 4: Simplify right side
    820,152.70x = 517,829,984,092.10
  5. Step 5: Solve for x
    x = 517,829,984,092.10/820,152.70
  6. Step 6: Final answer
    x = 631,382.40

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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.