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Finding the Fourth Proportional to 867,164.60, 1,301,135.70 and 393,606.20

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Solution

The fourth proportional to 867,164.60, 1,301,135.70 and 393,606.20 is: 590,585.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,164.60 : 1,301,135.70 = 393,606.20 : x
  2. Step 2: Convert to fraction form
    867,164.60/1,301,135.70 = 393,606.20/x
  3. Step 3: Cross multiply
    867,164.60x = 1,301,135.70 × 393,606.20
  4. Step 4: Simplify right side
    867,164.60x = 512,135,078,561.34
  5. Step 5: Solve for x
    x = 512,135,078,561.34/867,164.60
  6. Step 6: Final answer
    x = 590,585.78

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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.