Home / 1,547.22-2,135.32-917.94

Finding the Fourth Proportional to 1,547.22, 2,135.32 and 917.94

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Solution

The fourth proportional to 1,547.22, 2,135.32 and 917.94 is: 1,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.22 : 2,135.32 = 917.94 : x
  2. Step 2: Convert to fraction form
    1,547.22/2,135.32 = 917.94/x
  3. Step 3: Cross multiply
    1,547.22x = 2,135.32 × 917.94
  4. Step 4: Simplify right side
    1,547.22x = 1,960,095.64
  5. Step 5: Solve for x
    x = 1,960,095.64/1,547.22
  6. Step 6: Final answer
    x = 1,266.85

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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.