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Finding the Fourth Proportional to 717,855.54, 990,632.35 and 407,755.97

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Solution

The fourth proportional to 717,855.54, 990,632.35 and 407,755.97 is: 562,698.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,855.54 : 990,632.35 = 407,755.97 : x
  2. Step 2: Convert to fraction form
    717,855.54/990,632.35 = 407,755.97/x
  3. Step 3: Cross multiply
    717,855.54x = 990,632.35 × 407,755.97
  4. Step 4: Simplify right side
    717,855.54x = 403,936,254,787.63
  5. Step 5: Solve for x
    x = 403,936,254,787.63/717,855.54
  6. Step 6: Final answer
    x = 562,698.53

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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.