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Finding the Fourth Proportional to 550.76, 760.10 and 317.96

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Solution

The fourth proportional to 550.76, 760.10 and 317.96 is: 438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.76 : 760.10 = 317.96 : x
  2. Step 2: Convert to fraction form
    550.76/760.10 = 317.96/x
  3. Step 3: Cross multiply
    550.76x = 760.10 × 317.96
  4. Step 4: Simplify right side
    550.76x = 241,681.40
  5. Step 5: Solve for x
    x = 241,681.40/550.76
  6. Step 6: Final answer
    x = 438.81

Related Problems

Find fourth proportional to 275.38, 380.05 and 158.98
Half scale
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Double scale
Find fourth proportional to 551.76, 761.48 and 318.96
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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.