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Finding the Fourth Proportional to 717,518, 990,174.88 and 415,886.96

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Solution

The fourth proportional to 717,518, 990,174.88 and 415,886.96 is: 573,924.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,518 : 990,174.88 = 415,886.96 : x
  2. Step 2: Convert to fraction form
    717,518/990,174.88 = 415,886.96/x
  3. Step 3: Cross multiply
    717,518x = 990,174.88 × 415,886.96
  4. Step 4: Simplify right side
    717,518x = 411,800,820,711.57
  5. Step 5: Solve for x
    x = 411,800,820,711.57/717,518
  6. Step 6: Final answer
    x = 573,924.03

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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.