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Finding the Fourth Proportional to 717,399.85, 990,056.56 and 395,109.86

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Solution

The fourth proportional to 717,399.85, 990,056.56 and 395,109.86 is: 545,276.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,399.85 : 990,056.56 = 395,109.86 : x
  2. Step 2: Convert to fraction form
    717,399.85/990,056.56 = 395,109.86/x
  3. Step 3: Cross multiply
    717,399.85x = 990,056.56 × 395,109.86
  4. Step 4: Simplify right side
    717,399.85x = 391,181,108,813.68
  5. Step 5: Solve for x
    x = 391,181,108,813.68/717,399.85
  6. Step 6: Final answer
    x = 545,276.26

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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.