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Finding the Fourth Proportional to 666,213.64, 919,116.60 and 424,453

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Solution

The fourth proportional to 666,213.64, 919,116.60 and 424,453 is: 585,580.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,213.64 : 919,116.60 = 424,453 : x
  2. Step 2: Convert to fraction form
    666,213.64/919,116.60 = 424,453/x
  3. Step 3: Cross multiply
    666,213.64x = 919,116.60 × 424,453
  4. Step 4: Simplify right side
    666,213.64x = 390,121,798,219.80
  5. Step 5: Solve for x
    x = 390,121,798,219.80/666,213.64
  6. Step 6: Final answer
    x = 585,580.62

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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.