Home / 717,975.88-990,802.46-391,288.50

Finding the Fourth Proportional to 717,975.88, 990,802.46 and 391,288.50

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Solution

The fourth proportional to 717,975.88, 990,802.46 and 391,288.50 is: 539,975.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,975.88 : 990,802.46 = 391,288.50 : x
  2. Step 2: Convert to fraction form
    717,975.88/990,802.46 = 391,288.50/x
  3. Step 3: Cross multiply
    717,975.88x = 990,802.46 × 391,288.50
  4. Step 4: Simplify right side
    717,975.88x = 387,689,608,369.71
  5. Step 5: Solve for x
    x = 387,689,608,369.71/717,975.88
  6. Step 6: Final answer
    x = 539,975.81

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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.