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Finding the Fourth Proportional to 646,129.26, 891,638.55 and 359,641.98

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Solution

The fourth proportional to 646,129.26, 891,638.55 and 359,641.98 is: 496,294.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,129.26 : 891,638.55 = 359,641.98 : x
  2. Step 2: Convert to fraction form
    646,129.26/891,638.55 = 359,641.98/x
  3. Step 3: Cross multiply
    646,129.26x = 891,638.55 × 359,641.98
  4. Step 4: Simplify right side
    646,129.26x = 320,670,653,566.33
  5. Step 5: Solve for x
    x = 320,670,653,566.33/646,129.26
  6. Step 6: Final answer
    x = 496,294.90

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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.