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Finding the Fourth Proportional to 562.79, 776.88 and 486.77

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Solution

The fourth proportional to 562.79, 776.88 and 486.77 is: 671.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.79 : 776.88 = 486.77 : x
  2. Step 2: Convert to fraction form
    562.79/776.88 = 486.77/x
  3. Step 3: Cross multiply
    562.79x = 776.88 × 486.77
  4. Step 4: Simplify right side
    562.79x = 378,157.99
  5. Step 5: Solve for x
    x = 378,157.99/562.79
  6. Step 6: Final answer
    x = 671.94

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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.