Home / 1,356.36-1,868.58-1,118.76

Finding the Fourth Proportional to 1,356.36, 1,868.58 and 1,118.76

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Solution

The fourth proportional to 1,356.36, 1,868.58 and 1,118.76 is: 1,541.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.36 : 1,868.58 = 1,118.76 : x
  2. Step 2: Convert to fraction form
    1,356.36/1,868.58 = 1,118.76/x
  3. Step 3: Cross multiply
    1,356.36x = 1,868.58 × 1,118.76
  4. Step 4: Simplify right side
    1,356.36x = 2,090,492.56
  5. Step 5: Solve for x
    x = 2,090,492.56/1,356.36
  6. Step 6: Final answer
    x = 1,541.25

Related Problems

Find fourth proportional to 678.18, 934.29 and 559.38
Half scale
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Double scale
Find fourth proportional to 1,357.36, 1,869.96 and 1,119.76
Similar ratio
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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.