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Finding the Fourth Proportional to 406,989.30, 609,317.55 and 395,325.30

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Solution

The fourth proportional to 406,989.30, 609,317.55 and 395,325.30 is: 591,854.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,989.30 : 609,317.55 = 395,325.30 : x
  2. Step 2: Convert to fraction form
    406,989.30/609,317.55 = 395,325.30/x
  3. Step 3: Cross multiply
    406,989.30x = 609,317.55 × 395,325.30
  4. Step 4: Simplify right side
    406,989.30x = 240,878,643,249.02
  5. Step 5: Solve for x
    x = 240,878,643,249.02/406,989.30
  6. Step 6: Final answer
    x = 591,854.98

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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.