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Finding the Fourth Proportional to 561.61, 776.10 and 404.77

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Solution

The fourth proportional to 561.61, 776.10 and 404.77 is: 559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.61 : 776.10 = 404.77 : x
  2. Step 2: Convert to fraction form
    561.61/776.10 = 404.77/x
  3. Step 3: Cross multiply
    561.61x = 776.10 × 404.77
  4. Step 4: Simplify right side
    561.61x = 314,138.88
  5. Step 5: Solve for x
    x = 314,138.88/561.61
  6. Step 6: Final answer
    x = 559.35

Related Problems

Find fourth proportional to 280.81, 388.05 and 202.38
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Double scale
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Similar ratio
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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.