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Finding the Fourth Proportional to 885,658.68, 1,328,508.54 and 317,078.64

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Solution

The fourth proportional to 885,658.68, 1,328,508.54 and 317,078.64 is: 475,625.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,658.68 : 1,328,508.54 = 317,078.64 : x
  2. Step 2: Convert to fraction form
    885,658.68/1,328,508.54 = 317,078.64/x
  3. Step 3: Cross multiply
    885,658.68x = 1,328,508.54 × 317,078.64
  4. Step 4: Simplify right side
    885,658.68x = 421,241,681,091.59
  5. Step 5: Solve for x
    x = 421,241,681,091.59/885,658.68
  6. Step 6: Final answer
    x = 475,625.31

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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.