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Finding the Fourth Proportional to 640,446.70, 883,244.38 and 531,378.35

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Solution

The fourth proportional to 640,446.70, 883,244.38 and 531,378.35 is: 732,827.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,446.70 : 883,244.38 = 531,378.35 : x
  2. Step 2: Convert to fraction form
    640,446.70/883,244.38 = 531,378.35/x
  3. Step 3: Cross multiply
    640,446.70x = 883,244.38 × 531,378.35
  4. Step 4: Simplify right side
    640,446.70x = 469,336,939,962.73
  5. Step 5: Solve for x
    x = 469,336,939,962.73/640,446.70
  6. Step 6: Final answer
    x = 732,827.48

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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.