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Finding the Fourth Proportional to 848.16, 1,168.05 and 661.32

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Solution

The fourth proportional to 848.16, 1,168.05 and 661.32 is: 910.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.16 : 1,168.05 = 661.32 : x
  2. Step 2: Convert to fraction form
    848.16/1,168.05 = 661.32/x
  3. Step 3: Cross multiply
    848.16x = 1,168.05 × 661.32
  4. Step 4: Simplify right side
    848.16x = 772,454.83
  5. Step 5: Solve for x
    x = 772,454.83/848.16
  6. Step 6: Final answer
    x = 910.74

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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.