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Finding the Fourth Proportional to 772,495.77, 1,066,025.07 and 428,333.05

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Solution

The fourth proportional to 772,495.77, 1,066,025.07 and 428,333.05 is: 591,089.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,495.77 : 1,066,025.07 = 428,333.05 : x
  2. Step 2: Convert to fraction form
    772,495.77/1,066,025.07 = 428,333.05/x
  3. Step 3: Cross multiply
    772,495.77x = 1,066,025.07 × 428,333.05
  4. Step 4: Simplify right side
    772,495.77x = 456,613,769,609.56
  5. Step 5: Solve for x
    x = 456,613,769,609.56/772,495.77
  6. Step 6: Final answer
    x = 591,089.02

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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.