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Finding the Fourth Proportional to 663,637.20, 995,779.80 and 308,468.40

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Solution

The fourth proportional to 663,637.20, 995,779.80 and 308,468.40 is: 462,853.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,637.20 : 995,779.80 = 308,468.40 : x
  2. Step 2: Convert to fraction form
    663,637.20/995,779.80 = 308,468.40/x
  3. Step 3: Cross multiply
    663,637.20x = 995,779.80 × 308,468.40
  4. Step 4: Simplify right side
    663,637.20x = 307,166,601,658.32
  5. Step 5: Solve for x
    x = 307,166,601,658.32/663,637.20
  6. Step 6: Final answer
    x = 462,853.20

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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.