Home / 1,403.51-1,934.21-1,009.85

Finding the Fourth Proportional to 1,403.51, 1,934.21 and 1,009.85

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Solution

The fourth proportional to 1,403.51, 1,934.21 and 1,009.85 is: 1,391.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.51 : 1,934.21 = 1,009.85 : x
  2. Step 2: Convert to fraction form
    1,403.51/1,934.21 = 1,009.85/x
  3. Step 3: Cross multiply
    1,403.51x = 1,934.21 × 1,009.85
  4. Step 4: Simplify right side
    1,403.51x = 1,953,254.82
  5. Step 5: Solve for x
    x = 1,953,254.82/1,403.51
  6. Step 6: Final answer
    x = 1,391.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.