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Finding the Fourth Proportional to 771,810.90, 1,157,716.35 and 210,845.40

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Solution

The fourth proportional to 771,810.90, 1,157,716.35 and 210,845.40 is: 316,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,810.90 : 1,157,716.35 = 210,845.40 : x
  2. Step 2: Convert to fraction form
    771,810.90/1,157,716.35 = 210,845.40/x
  3. Step 3: Cross multiply
    771,810.90x = 1,157,716.35 × 210,845.40
  4. Step 4: Simplify right side
    771,810.90x = 244,099,166,902.29
  5. Step 5: Solve for x
    x = 244,099,166,902.29/771,810.90
  6. Step 6: Final answer
    x = 316,268.10

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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.