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Finding the Fourth Proportional to 620,902.90, 856,853.72 and 375,884.40

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Solution

The fourth proportional to 620,902.90, 856,853.72 and 375,884.40 is: 518,725.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,902.90 : 856,853.72 = 375,884.40 : x
  2. Step 2: Convert to fraction form
    620,902.90/856,853.72 = 375,884.40/x
  3. Step 3: Cross multiply
    620,902.90x = 856,853.72 × 375,884.40
  4. Step 4: Simplify right side
    620,902.90x = 322,077,946,429.97
  5. Step 5: Solve for x
    x = 322,077,946,429.97/620,902.90
  6. Step 6: Final answer
    x = 518,725.14

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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.