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Finding the Fourth Proportional to 647,112.13, 893,017.72 and 375,340.93

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Solution

The fourth proportional to 647,112.13, 893,017.72 and 375,340.93 is: 517,972.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,112.13 : 893,017.72 = 375,340.93 : x
  2. Step 2: Convert to fraction form
    647,112.13/893,017.72 = 375,340.93/x
  3. Step 3: Cross multiply
    647,112.13x = 893,017.72 × 375,340.93
  4. Step 4: Simplify right side
    647,112.13x = 335,186,101,531.28
  5. Step 5: Solve for x
    x = 335,186,101,531.28/647,112.13
  6. Step 6: Final answer
    x = 517,972.21

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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.