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Finding the Fourth Proportional to 371,653.28, 512,913.12 and 210,537.20

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Solution

The fourth proportional to 371,653.28, 512,913.12 and 210,537.20 is: 290,559.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,653.28 : 512,913.12 = 210,537.20 : x
  2. Step 2: Convert to fraction form
    371,653.28/512,913.12 = 210,537.20/x
  3. Step 3: Cross multiply
    371,653.28x = 512,913.12 × 210,537.20
  4. Step 4: Simplify right side
    371,653.28x = 107,987,292,128.06
  5. Step 5: Solve for x
    x = 107,987,292,128.06/371,653.28
  6. Step 6: Final answer
    x = 290,559.23

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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.