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Finding the Fourth Proportional to 717,855.48, 990,640.65 and 416,224.44

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Solution

The fourth proportional to 717,855.48, 990,640.65 and 416,224.44 is: 574,389.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,855.48 : 990,640.65 = 416,224.44 : x
  2. Step 2: Convert to fraction form
    717,855.48/990,640.65 = 416,224.44/x
  3. Step 3: Cross multiply
    717,855.48x = 990,640.65 × 416,224.44
  4. Step 4: Simplify right side
    717,855.48x = 412,328,849,787.49
  5. Step 5: Solve for x
    x = 412,328,849,787.49/717,855.48
  6. Step 6: Final answer
    x = 574,389.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.