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Finding the Fourth Proportional to 371,506.78, 512,681.31 and 210,393.19

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Solution

The fourth proportional to 371,506.78, 512,681.31 and 210,393.19 is: 290,343.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,506.78 : 512,681.31 = 210,393.19 : x
  2. Step 2: Convert to fraction form
    371,506.78/512,681.31 = 210,393.19/x
  3. Step 3: Cross multiply
    371,506.78x = 512,681.31 × 210,393.19
  4. Step 4: Simplify right side
    371,506.78x = 107,864,656,264.28
  5. Step 5: Solve for x
    x = 107,864,656,264.28/371,506.78
  6. Step 6: Final answer
    x = 290,343.71

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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.