Home / 1,547.89-2,135.23-917.81

Finding the Fourth Proportional to 1,547.89, 2,135.23 and 917.81

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Solution

The fourth proportional to 1,547.89, 2,135.23 and 917.81 is: 1,266.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.89 : 2,135.23 = 917.81 : x
  2. Step 2: Convert to fraction form
    1,547.89/2,135.23 = 917.81/x
  3. Step 3: Cross multiply
    1,547.89x = 2,135.23 × 917.81
  4. Step 4: Simplify right side
    1,547.89x = 1,959,735.45
  5. Step 5: Solve for x
    x = 1,959,735.45/1,547.89
  6. Step 6: Final answer
    x = 1,266.07

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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.