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Finding the Fourth Proportional to 645,098.48, 890,212.88 and 358,630.64

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Solution

The fourth proportional to 645,098.48, 890,212.88 and 358,630.64 is: 494,897.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,098.48 : 890,212.88 = 358,630.64 : x
  2. Step 2: Convert to fraction form
    645,098.48/890,212.88 = 358,630.64/x
  3. Step 3: Cross multiply
    645,098.48x = 890,212.88 × 358,630.64
  4. Step 4: Simplify right side
    645,098.48x = 319,257,614,890.64
  5. Step 5: Solve for x
    x = 319,257,614,890.64/645,098.48
  6. Step 6: Final answer
    x = 494,897.48

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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.