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Finding the Fourth Proportional to 657,203.60, 985,805.40 and 421,007.60

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Solution

The fourth proportional to 657,203.60, 985,805.40 and 421,007.60 is: 631,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,203.60 : 985,805.40 = 421,007.60 : x
  2. Step 2: Convert to fraction form
    657,203.60/985,805.40 = 421,007.60/x
  3. Step 3: Cross multiply
    657,203.60x = 985,805.40 × 421,007.60
  4. Step 4: Simplify right side
    657,203.60x = 415,031,565,521.04
  5. Step 5: Solve for x
    x = 415,031,565,521.04/657,203.60
  6. Step 6: Final answer
    x = 631,511.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.