Home / 645,130.08-890,309.82-358,654.92

Finding the Fourth Proportional to 645,130.08, 890,309.82 and 358,654.92

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Solution

The fourth proportional to 645,130.08, 890,309.82 and 358,654.92 is: 494,960.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,130.08 : 890,309.82 = 358,654.92 : x
  2. Step 2: Convert to fraction form
    645,130.08/890,309.82 = 358,654.92/x
  3. Step 3: Cross multiply
    645,130.08x = 890,309.82 × 358,654.92
  4. Step 4: Simplify right side
    645,130.08x = 319,313,997,267.31
  5. Step 5: Solve for x
    x = 319,313,997,267.31/645,130.08
  6. Step 6: Final answer
    x = 494,960.64

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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.