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Finding the Fourth Proportional to 406,987.40, 610,308.30 and 196,689.80

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Solution

The fourth proportional to 406,987.40, 610,308.30 and 196,689.80 is: 294,951.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,987.40 : 610,308.30 = 196,689.80 : x
  2. Step 2: Convert to fraction form
    406,987.40/610,308.30 = 196,689.80/x
  3. Step 3: Cross multiply
    406,987.40x = 610,308.30 × 196,689.80
  4. Step 4: Simplify right side
    406,987.40x = 120,041,417,465.34
  5. Step 5: Solve for x
    x = 120,041,417,465.34/406,987.40
  6. Step 6: Final answer
    x = 294,951.19

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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.