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Finding the Fourth Proportional to 717,855.60, 990,636.12 and 395,568.24

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Solution

The fourth proportional to 717,855.60, 990,636.12 and 395,568.24 is: 545,881.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,855.60 : 990,636.12 = 395,568.24 : x
  2. Step 2: Convert to fraction form
    717,855.60/990,636.12 = 395,568.24/x
  3. Step 3: Cross multiply
    717,855.60x = 990,636.12 × 395,568.24
  4. Step 4: Simplify right side
    717,855.60x = 391,864,186,468.83
  5. Step 5: Solve for x
    x = 391,864,186,468.83/717,855.60
  6. Step 6: Final answer
    x = 545,881.63

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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.