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Finding the Fourth Proportional to 555.38, 766.12 and 345.48

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Solution

The fourth proportional to 555.38, 766.12 and 345.48 is: 476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.38 : 766.12 = 345.48 : x
  2. Step 2: Convert to fraction form
    555.38/766.12 = 345.48/x
  3. Step 3: Cross multiply
    555.38x = 766.12 × 345.48
  4. Step 4: Simplify right side
    555.38x = 264,679.14
  5. Step 5: Solve for x
    x = 264,679.14/555.38
  6. Step 6: Final answer
    x = 476.57

Related Problems

Find fourth proportional to 277.69, 383.06 and 172.74
Half scale
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Double scale
Find fourth proportional to 556.38, 767.50 and 346.48
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.