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Finding the Fourth Proportional to 790.16, 1,090.30 and 440.86

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Solution

The fourth proportional to 790.16, 1,090.30 and 440.86 is: 608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.16 : 1,090.30 = 440.86 : x
  2. Step 2: Convert to fraction form
    790.16/1,090.30 = 440.86/x
  3. Step 3: Cross multiply
    790.16x = 1,090.30 × 440.86
  4. Step 4: Simplify right side
    790.16x = 480,669.66
  5. Step 5: Solve for x
    x = 480,669.66/790.16
  6. Step 6: Final answer
    x = 608.32

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Half scale
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Double scale
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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.