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Finding the Fourth Proportional to 586.41, 877.78 and 429.90

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Solution

The fourth proportional to 586.41, 877.78 and 429.90 is: 643.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.41 : 877.78 = 429.90 : x
  2. Step 2: Convert to fraction form
    586.41/877.78 = 429.90/x
  3. Step 3: Cross multiply
    586.41x = 877.78 × 429.90
  4. Step 4: Simplify right side
    586.41x = 377,357.62
  5. Step 5: Solve for x
    x = 377,357.62/586.41
  6. Step 6: Final answer
    x = 643.50

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.