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Finding the Fourth Proportional to 406,243.20, 609,364.80 and 403,478.40

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Solution

The fourth proportional to 406,243.20, 609,364.80 and 403,478.40 is: 605,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,243.20 : 609,364.80 = 403,478.40 : x
  2. Step 2: Convert to fraction form
    406,243.20/609,364.80 = 403,478.40/x
  3. Step 3: Cross multiply
    406,243.20x = 609,364.80 × 403,478.40
  4. Step 4: Simplify right side
    406,243.20x = 245,865,534,520.32
  5. Step 5: Solve for x
    x = 245,865,534,520.32/406,243.20
  6. Step 6: Final answer
    x = 605,217.60

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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.