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Finding the Fourth Proportional to 1,921.07, 2,879.18 and 934.13

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Solution

The fourth proportional to 1,921.07, 2,879.18 and 934.13 is: 1,400.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.07 : 2,879.18 = 934.13 : x
  2. Step 2: Convert to fraction form
    1,921.07/2,879.18 = 934.13/x
  3. Step 3: Cross multiply
    1,921.07x = 2,879.18 × 934.13
  4. Step 4: Simplify right side
    1,921.07x = 2,689,509.35
  5. Step 5: Solve for x
    x = 2,689,509.35/1,921.07
  6. Step 6: Final answer
    x = 1,400.00

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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.