Home / 771,490.80-1,157,236.20-210,525.30

Finding the Fourth Proportional to 771,490.80, 1,157,236.20 and 210,525.30

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Solution

The fourth proportional to 771,490.80, 1,157,236.20 and 210,525.30 is: 315,787.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,490.80 : 1,157,236.20 = 210,525.30 : x
  2. Step 2: Convert to fraction form
    771,490.80/1,157,236.20 = 210,525.30/x
  3. Step 3: Cross multiply
    771,490.80x = 1,157,236.20 × 210,525.30
  4. Step 4: Simplify right side
    771,490.80x = 243,627,498,175.86
  5. Step 5: Solve for x
    x = 243,627,498,175.86/771,490.80
  6. Step 6: Final answer
    x = 315,787.95

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Double scale
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Similar ratio
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1.5x scale

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.