Home / 1,530.07-2,110.69-939.58

Finding the Fourth Proportional to 1,530.07, 2,110.69 and 939.58

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Solution

The fourth proportional to 1,530.07, 2,110.69 and 939.58 is: 1,296.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.07 : 2,110.69 = 939.58 : x
  2. Step 2: Convert to fraction form
    1,530.07/2,110.69 = 939.58/x
  3. Step 3: Cross multiply
    1,530.07x = 2,110.69 × 939.58
  4. Step 4: Simplify right side
    1,530.07x = 1,983,158.01
  5. Step 5: Solve for x
    x = 1,983,158.01/1,530.07
  6. Step 6: Final answer
    x = 1,296.12

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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.