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Finding the Fourth Proportional to 645,066.72, 890,153.04 and 358,576.80

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Solution

The fourth proportional to 645,066.72, 890,153.04 and 358,576.80 is: 494,814.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,066.72 : 890,153.04 = 358,576.80 : x
  2. Step 2: Convert to fraction form
    645,066.72/890,153.04 = 358,576.80/x
  3. Step 3: Cross multiply
    645,066.72x = 890,153.04 × 358,576.80
  4. Step 4: Simplify right side
    645,066.72x = 319,188,228,593.47
  5. Step 5: Solve for x
    x = 319,188,228,593.47/645,066.72
  6. Step 6: Final answer
    x = 494,814.29

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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.