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Finding the Fourth Proportional to 647,393.79, 893,407.25 and 375,623.53

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Solution

The fourth proportional to 647,393.79, 893,407.25 and 375,623.53 is: 518,362.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,393.79 : 893,407.25 = 375,623.53 : x
  2. Step 2: Convert to fraction form
    647,393.79/893,407.25 = 375,623.53/x
  3. Step 3: Cross multiply
    647,393.79x = 893,407.25 × 375,623.53
  4. Step 4: Simplify right side
    647,393.79x = 335,584,784,972.59
  5. Step 5: Solve for x
    x = 335,584,784,972.59/647,393.79
  6. Step 6: Final answer
    x = 518,362.69

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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.