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Finding the Fourth Proportional to 1,907.68, 2,859.66 and 920.20

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Solution

The fourth proportional to 1,907.68, 2,859.66 and 920.20 is: 1,379.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.68 : 2,859.66 = 920.20 : x
  2. Step 2: Convert to fraction form
    1,907.68/2,859.66 = 920.20/x
  3. Step 3: Cross multiply
    1,907.68x = 2,859.66 × 920.20
  4. Step 4: Simplify right side
    1,907.68x = 2,631,459.13
  5. Step 5: Solve for x
    x = 2,631,459.13/1,907.68
  6. Step 6: Final answer
    x = 1,379.40

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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.