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Finding the Fourth Proportional to 646,318.64, 891,838.10 and 374,384.33

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Solution

The fourth proportional to 646,318.64, 891,838.10 and 374,384.33 is: 516,603.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,318.64 : 891,838.10 = 374,384.33 : x
  2. Step 2: Convert to fraction form
    646,318.64/891,838.10 = 374,384.33/x
  3. Step 3: Cross multiply
    646,318.64x = 891,838.10 × 374,384.33
  4. Step 4: Simplify right side
    646,318.64x = 333,890,207,252.22
  5. Step 5: Solve for x
    x = 333,890,207,252.22/646,318.64
  6. Step 6: Final answer
    x = 516,603.09

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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.