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Finding the Fourth Proportional to 885,493.80, 1,326,709.80 and 411,206.40

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Solution

The fourth proportional to 885,493.80, 1,326,709.80 and 411,206.40 is: 616,098.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,493.80 : 1,326,709.80 = 411,206.40 : x
  2. Step 2: Convert to fraction form
    885,493.80/1,326,709.80 = 411,206.40/x
  3. Step 3: Cross multiply
    885,493.80x = 1,326,709.80 × 411,206.40
  4. Step 4: Simplify right side
    885,493.80x = 545,551,560,702.72
  5. Step 5: Solve for x
    x = 545,551,560,702.72/885,493.80
  6. Step 6: Final answer
    x = 616,098.68

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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.