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Finding the Fourth Proportional to 717,955.52, 990,760.37 and 391,276.94

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Solution

The fourth proportional to 717,955.52, 990,760.37 and 391,276.94 is: 539,952.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,955.52 : 990,760.37 = 391,276.94 : x
  2. Step 2: Convert to fraction form
    717,955.52/990,760.37 = 391,276.94/x
  3. Step 3: Cross multiply
    717,955.52x = 990,760.37 × 391,276.94
  4. Step 4: Simplify right side
    717,955.52x = 387,661,685,846.87
  5. Step 5: Solve for x
    x = 387,661,685,846.87/717,955.52
  6. Step 6: Final answer
    x = 539,952.23

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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.