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Finding the Fourth Proportional to 628,385.36, 866,889.96 and 424,370

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Solution

The fourth proportional to 628,385.36, 866,889.96 and 424,370 is: 585,440.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,385.36 : 866,889.96 = 424,370 : x
  2. Step 2: Convert to fraction form
    628,385.36/866,889.96 = 424,370/x
  3. Step 3: Cross multiply
    628,385.36x = 866,889.96 × 424,370
  4. Step 4: Simplify right side
    628,385.36x = 367,882,092,325.20
  5. Step 5: Solve for x
    x = 367,882,092,325.20/628,385.36
  6. Step 6: Final answer
    x = 585,440.27

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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.