Home / 717,488.28-990,178.83-395,198.19

Finding the Fourth Proportional to 717,488.28, 990,178.83 and 395,198.19

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Solution

The fourth proportional to 717,488.28, 990,178.83 and 395,198.19 is: 545,398.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,488.28 : 990,178.83 = 395,198.19 : x
  2. Step 2: Convert to fraction form
    717,488.28/990,178.83 = 395,198.19/x
  3. Step 3: Cross multiply
    717,488.28x = 990,178.83 × 395,198.19
  4. Step 4: Simplify right side
    717,488.28x = 391,316,881,392.32
  5. Step 5: Solve for x
    x = 391,316,881,392.32/717,488.28
  6. Step 6: Final answer
    x = 545,398.29

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Half scale
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Double scale
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Similar ratio
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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.