Home / 1,579.08-2,178.60-915.69

Finding the Fourth Proportional to 1,579.08, 2,178.60 and 915.69

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Solution

The fourth proportional to 1,579.08, 2,178.60 and 915.69 is: 1,263.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.08 : 2,178.60 = 915.69 : x
  2. Step 2: Convert to fraction form
    1,579.08/2,178.60 = 915.69/x
  3. Step 3: Cross multiply
    1,579.08x = 2,178.60 × 915.69
  4. Step 4: Simplify right side
    1,579.08x = 1,994,922.23
  5. Step 5: Solve for x
    x = 1,994,922.23/1,579.08
  6. Step 6: Final answer
    x = 1,263.34

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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.