Home / 717,579.42-990,262.05-395,288.74

Finding the Fourth Proportional to 717,579.42, 990,262.05 and 395,288.74

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Solution

The fourth proportional to 717,579.42, 990,262.05 and 395,288.74 is: 545,499.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,579.42 : 990,262.05 = 395,288.74 : x
  2. Step 2: Convert to fraction form
    717,579.42/990,262.05 = 395,288.74/x
  3. Step 3: Cross multiply
    717,579.42x = 990,262.05 × 395,288.74
  4. Step 4: Simplify right side
    717,579.42x = 391,439,437,769.81
  5. Step 5: Solve for x
    x = 391,439,437,769.81/717,579.42
  6. Step 6: Final answer
    x = 545,499.81

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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.