Home / 645,623.70-968,435.55-393,681.30

Finding the Fourth Proportional to 645,623.70, 968,435.55 and 393,681.30

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Solution

The fourth proportional to 645,623.70, 968,435.55 and 393,681.30 is: 590,521.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,623.70 : 968,435.55 = 393,681.30 : x
  2. Step 2: Convert to fraction form
    645,623.70/968,435.55 = 393,681.30/x
  3. Step 3: Cross multiply
    645,623.70x = 968,435.55 × 393,681.30
  4. Step 4: Simplify right side
    645,623.70x = 381,254,966,290.22
  5. Step 5: Solve for x
    x = 381,254,966,290.22/645,623.70
  6. Step 6: Final answer
    x = 590,521.95

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.