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Finding the Fourth Proportional to 1,368.32, 1,888.02 and 808.76

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Solution

The fourth proportional to 1,368.32, 1,888.02 and 808.76 is: 1,115.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.32 : 1,888.02 = 808.76 : x
  2. Step 2: Convert to fraction form
    1,368.32/1,888.02 = 808.76/x
  3. Step 3: Cross multiply
    1,368.32x = 1,888.02 × 808.76
  4. Step 4: Simplify right side
    1,368.32x = 1,526,955.06
  5. Step 5: Solve for x
    x = 1,526,955.06/1,368.32
  6. Step 6: Final answer
    x = 1,115.93

Related Problems

Find fourth proportional to 684.16, 944.01 and 404.38
Half scale
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Double scale
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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.