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Finding the Fourth Proportional to 1,395.16, 1,925.10 and 805.58

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Solution

The fourth proportional to 1,395.16, 1,925.10 and 805.58 is: 1,111.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.16 : 1,925.10 = 805.58 : x
  2. Step 2: Convert to fraction form
    1,395.16/1,925.10 = 805.58/x
  3. Step 3: Cross multiply
    1,395.16x = 1,925.10 × 805.58
  4. Step 4: Simplify right side
    1,395.16x = 1,550,819.65
  5. Step 5: Solve for x
    x = 1,550,819.65/1,395.16
  6. Step 6: Final answer
    x = 1,111.57

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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.