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Finding the Fourth Proportional to 570.77, 787.73 and 477.35

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Solution

The fourth proportional to 570.77, 787.73 and 477.35 is: 658.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.77 : 787.73 = 477.35 : x
  2. Step 2: Convert to fraction form
    570.77/787.73 = 477.35/x
  3. Step 3: Cross multiply
    570.77x = 787.73 × 477.35
  4. Step 4: Simplify right side
    570.77x = 376,019.54
  5. Step 5: Solve for x
    x = 376,019.54/570.77
  6. Step 6: Final answer
    x = 658.79

Related Problems

Find fourth proportional to 285.38, 393.86 and 238.67
Half scale
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Double scale
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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.