Home / 1,507.13-2,079.50-947.71

Finding the Fourth Proportional to 1,507.13, 2,079.50 and 947.71

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Solution

The fourth proportional to 1,507.13, 2,079.50 and 947.71 is: 1,307.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.13 : 2,079.50 = 947.71 : x
  2. Step 2: Convert to fraction form
    1,507.13/2,079.50 = 947.71/x
  3. Step 3: Cross multiply
    1,507.13x = 2,079.50 × 947.71
  4. Step 4: Simplify right side
    1,507.13x = 1,970,762.95
  5. Step 5: Solve for x
    x = 1,970,762.95/1,507.13
  6. Step 6: Final answer
    x = 1,307.63

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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.