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Finding the Fourth Proportional to 717,510, 990,163.80 and 415,878.96

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Solution

The fourth proportional to 717,510, 990,163.80 and 415,878.96 is: 573,912.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,510 : 990,163.80 = 415,878.96 : x
  2. Step 2: Convert to fraction form
    717,510/990,163.80 = 415,878.96/x
  3. Step 3: Cross multiply
    717,510x = 990,163.80 × 415,878.96
  4. Step 4: Simplify right side
    717,510x = 411,788,291,373.65
  5. Step 5: Solve for x
    x = 411,788,291,373.65/717,510
  6. Step 6: Final answer
    x = 573,912.96

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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.