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Finding the Fourth Proportional to 561.60, 848.70 and 529.20

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Solution

The fourth proportional to 561.60, 848.70 and 529.20 is: 799.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.60 : 848.70 = 529.20 : x
  2. Step 2: Convert to fraction form
    561.60/848.70 = 529.20/x
  3. Step 3: Cross multiply
    561.60x = 848.70 × 529.20
  4. Step 4: Simplify right side
    561.60x = 449,132.04
  5. Step 5: Solve for x
    x = 449,132.04/561.60
  6. Step 6: Final answer
    x = 799.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.