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Finding the Fourth Proportional to 885,908.40, 1,328,603.40 and 317,223.60

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Solution

The fourth proportional to 885,908.40, 1,328,603.40 and 317,223.60 is: 475,742.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,908.40 : 1,328,603.40 = 317,223.60 : x
  2. Step 2: Convert to fraction form
    885,908.40/1,328,603.40 = 317,223.60/x
  3. Step 3: Cross multiply
    885,908.40x = 1,328,603.40 × 317,223.60
  4. Step 4: Simplify right side
    885,908.40x = 421,464,353,520.24
  5. Step 5: Solve for x
    x = 421,464,353,520.24/885,908.40
  6. Step 6: Final answer
    x = 475,742.59

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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.