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Finding the Fourth Proportional to 645,760.19, 891,048.39 and 373,774.88

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Solution

The fourth proportional to 645,760.19, 891,048.39 and 373,774.88 is: 515,751.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,760.19 : 891,048.39 = 373,774.88 : x
  2. Step 2: Convert to fraction form
    645,760.19/891,048.39 = 373,774.88/x
  3. Step 3: Cross multiply
    645,760.19x = 891,048.39 × 373,774.88
  4. Step 4: Simplify right side
    645,760.19x = 333,051,505,046.44
  5. Step 5: Solve for x
    x = 333,051,505,046.44/645,760.19
  6. Step 6: Final answer
    x = 515,751.06

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Double scale
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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.