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Finding the Fourth Proportional to 657,129.62, 906,881.20 and 370,643.56

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Solution

The fourth proportional to 657,129.62, 906,881.20 and 370,643.56 is: 511,511.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,129.62 : 906,881.20 = 370,643.56 : x
  2. Step 2: Convert to fraction form
    657,129.62/906,881.20 = 370,643.56/x
  3. Step 3: Cross multiply
    657,129.62x = 906,881.20 × 370,643.56
  4. Step 4: Simplify right side
    657,129.62x = 336,129,673,271.26
  5. Step 5: Solve for x
    x = 336,129,673,271.26/657,129.62
  6. Step 6: Final answer
    x = 511,511.98

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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.