Home / 717,528.16-990,184.26-395,230.78

Finding the Fourth Proportional to 717,528.16, 990,184.26 and 395,230.78

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Solution

The fourth proportional to 717,528.16, 990,184.26 and 395,230.78 is: 545,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,528.16 : 990,184.26 = 395,230.78 : x
  2. Step 2: Convert to fraction form
    717,528.16/990,184.26 = 395,230.78/x
  3. Step 3: Cross multiply
    717,528.16x = 990,184.26 × 395,230.78
  4. Step 4: Simplify right side
    717,528.16x = 391,351,297,423.52
  5. Step 5: Solve for x
    x = 391,351,297,423.52/717,528.16
  6. Step 6: Final answer
    x = 545,415.94

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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.