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Finding the Fourth Proportional to 645,498.96, 890,726.16 and 373,512.60

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Solution

The fourth proportional to 645,498.96, 890,726.16 and 373,512.60 is: 515,411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,498.96 : 890,726.16 = 373,512.60 : x
  2. Step 2: Convert to fraction form
    645,498.96/890,726.16 = 373,512.60/x
  3. Step 3: Cross multiply
    645,498.96x = 890,726.16 × 373,512.60
  4. Step 4: Simplify right side
    645,498.96x = 332,697,443,909.62
  5. Step 5: Solve for x
    x = 332,697,443,909.62/645,498.96
  6. Step 6: Final answer
    x = 515,411.28

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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.