Home / 1,530.07-2,111.66-900.75

Finding the Fourth Proportional to 1,530.07, 2,111.66 and 900.75

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Solution

The fourth proportional to 1,530.07, 2,111.66 and 900.75 is: 1,243.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.07 : 2,111.66 = 900.75 : x
  2. Step 2: Convert to fraction form
    1,530.07/2,111.66 = 900.75/x
  3. Step 3: Cross multiply
    1,530.07x = 2,111.66 × 900.75
  4. Step 4: Simplify right side
    1,530.07x = 1,902,080.00
  5. Step 5: Solve for x
    x = 1,902,080.00/1,530.07
  6. Step 6: Final answer
    x = 1,243.13

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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.