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Finding the Fourth Proportional to 810.93, 1,216.27 and 263.03

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Solution

The fourth proportional to 810.93, 1,216.27 and 263.03 is: 394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.93 : 1,216.27 = 263.03 : x
  2. Step 2: Convert to fraction form
    810.93/1,216.27 = 263.03/x
  3. Step 3: Cross multiply
    810.93x = 1,216.27 × 263.03
  4. Step 4: Simplify right side
    810.93x = 319,914.18
  5. Step 5: Solve for x
    x = 319,914.18/810.93
  6. Step 6: Final answer
    x = 394.50

Related Problems

Find fourth proportional to 405.47, 608.13 and 131.52
Half scale
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Double scale
Find fourth proportional to 811.93, 1,217.76 and 264.03
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.