Home / 1,547.94-2,135.84-918.37

Finding the Fourth Proportional to 1,547.94, 2,135.84 and 918.37

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Solution

The fourth proportional to 1,547.94, 2,135.84 and 918.37 is: 1,267.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.94 : 2,135.84 = 918.37 : x
  2. Step 2: Convert to fraction form
    1,547.94/2,135.84 = 918.37/x
  3. Step 3: Cross multiply
    1,547.94x = 2,135.84 × 918.37
  4. Step 4: Simplify right side
    1,547.94x = 1,961,489.46
  5. Step 5: Solve for x
    x = 1,961,489.46/1,547.94
  6. Step 6: Final answer
    x = 1,267.16

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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.