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Finding the Fourth Proportional to 1,206.83, 1,810.13 and 385.70

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Solution

The fourth proportional to 1,206.83, 1,810.13 and 385.70 is: 578.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.83 : 1,810.13 = 385.70 : x
  2. Step 2: Convert to fraction form
    1,206.83/1,810.13 = 385.70/x
  3. Step 3: Cross multiply
    1,206.83x = 1,810.13 × 385.70
  4. Step 4: Simplify right side
    1,206.83x = 698,158.33
  5. Step 5: Solve for x
    x = 698,158.33/1,206.83
  6. Step 6: Final answer
    x = 578.50

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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.