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Finding the Fourth Proportional to 613,294.32, 845,987.43 and 398,577.39

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Solution

The fourth proportional to 613,294.32, 845,987.43 and 398,577.39 is: 549,803.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,294.32 : 845,987.43 = 398,577.39 : x
  2. Step 2: Convert to fraction form
    613,294.32/845,987.43 = 398,577.39/x
  3. Step 3: Cross multiply
    613,294.32x = 845,987.43 × 398,577.39
  4. Step 4: Simplify right side
    613,294.32x = 337,191,461,822.21
  5. Step 5: Solve for x
    x = 337,191,461,822.21/613,294.32
  6. Step 6: Final answer
    x = 549,803.66

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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.