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Finding the Fourth Proportional to 717,580.69, 990,250.72 and 395,291.00

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Solution

The fourth proportional to 717,580.69, 990,250.72 and 395,291.00 is: 545,495.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,580.69 : 990,250.72 = 395,291.00 : x
  2. Step 2: Convert to fraction form
    717,580.69/990,250.72 = 395,291.00/x
  3. Step 3: Cross multiply
    717,580.69x = 990,250.72 × 395,291.00
  4. Step 4: Simplify right side
    717,580.69x = 391,437,198,846.92
  5. Step 5: Solve for x
    x = 391,437,198,846.92/717,580.69
  6. Step 6: Final answer
    x = 545,495.73

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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.