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Finding the Fourth Proportional to 438,430.60, 657,645.90 and 399,723.40

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Solution

The fourth proportional to 438,430.60, 657,645.90 and 399,723.40 is: 599,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,430.60 : 657,645.90 = 399,723.40 : x
  2. Step 2: Convert to fraction form
    438,430.60/657,645.90 = 399,723.40/x
  3. Step 3: Cross multiply
    438,430.60x = 657,645.90 × 399,723.40
  4. Step 4: Simplify right side
    438,430.60x = 262,876,455,144.06
  5. Step 5: Solve for x
    x = 262,876,455,144.06/438,430.60
  6. Step 6: Final answer
    x = 599,585.10

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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.