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Finding the Fourth Proportional to 665,015.83, 997,663.92 and 215,701.74

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Solution

The fourth proportional to 665,015.83, 997,663.92 and 215,701.74 is: 323,598.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,015.83 : 997,663.92 = 215,701.74 : x
  2. Step 2: Convert to fraction form
    665,015.83/997,663.92 = 215,701.74/x
  3. Step 3: Cross multiply
    665,015.83x = 997,663.92 × 215,701.74
  4. Step 4: Simplify right side
    665,015.83x = 215,197,843,479.22
  5. Step 5: Solve for x
    x = 215,197,843,479.22/665,015.83
  6. Step 6: Final answer
    x = 323,598.08

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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.