Home / 717,856.81-990,595.77-395,566.91

Finding the Fourth Proportional to 717,856.81, 990,595.77 and 395,566.91

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Solution

The fourth proportional to 717,856.81, 990,595.77 and 395,566.91 is: 545,856.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,856.81 : 990,595.77 = 395,566.91 : x
  2. Step 2: Convert to fraction form
    717,856.81/990,595.77 = 395,566.91/x
  3. Step 3: Cross multiply
    717,856.81x = 990,595.77 × 395,566.91
  4. Step 4: Simplify right side
    717,856.81x = 391,846,910,364.41
  5. Step 5: Solve for x
    x = 391,846,910,364.41/717,856.81
  6. Step 6: Final answer
    x = 545,856.64

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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.