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Finding the Fourth Proportional to 647,645.40, 893,759.40 and 375,728.40

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Solution

The fourth proportional to 647,645.40, 893,759.40 and 375,728.40 is: 518,510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,645.40 : 893,759.40 = 375,728.40 : x
  2. Step 2: Convert to fraction form
    647,645.40/893,759.40 = 375,728.40/x
  3. Step 3: Cross multiply
    647,645.40x = 893,759.40 × 375,728.40
  4. Step 4: Simplify right side
    647,645.40x = 335,810,789,346.96
  5. Step 5: Solve for x
    x = 335,810,789,346.96/647,645.40
  6. Step 6: Final answer
    x = 518,510.27

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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.