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Finding the Fourth Proportional to 555.61, 766.85 and 345.88

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Solution

The fourth proportional to 555.61, 766.85 and 345.88 is: 477.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.61 : 766.85 = 345.88 : x
  2. Step 2: Convert to fraction form
    555.61/766.85 = 345.88/x
  3. Step 3: Cross multiply
    555.61x = 766.85 × 345.88
  4. Step 4: Simplify right side
    555.61x = 265,238.08
  5. Step 5: Solve for x
    x = 265,238.08/555.61
  6. Step 6: Final answer
    x = 477.38

Related Problems

Find fourth proportional to 277.81, 383.43 and 172.94
Half scale
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Double scale
Find fourth proportional to 556.61, 768.23 and 346.88
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.