Home / 1,507.07-2,079.68-917.49

Finding the Fourth Proportional to 1,507.07, 2,079.68 and 917.49

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Solution

The fourth proportional to 1,507.07, 2,079.68 and 917.49 is: 1,266.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.07 : 2,079.68 = 917.49 : x
  2. Step 2: Convert to fraction form
    1,507.07/2,079.68 = 917.49/x
  3. Step 3: Cross multiply
    1,507.07x = 2,079.68 × 917.49
  4. Step 4: Simplify right side
    1,507.07x = 1,908,088.81
  5. Step 5: Solve for x
    x = 1,908,088.81/1,507.07
  6. Step 6: Final answer
    x = 1,266.09

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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.