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Finding the Fourth Proportional to 545,949.72, 753,129.90 and 354,893.40

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Solution

The fourth proportional to 545,949.72, 753,129.90 and 354,893.40 is: 489,570.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,949.72 : 753,129.90 = 354,893.40 : x
  2. Step 2: Convert to fraction form
    545,949.72/753,129.90 = 354,893.40/x
  3. Step 3: Cross multiply
    545,949.72x = 753,129.90 × 354,893.40
  4. Step 4: Simplify right side
    545,949.72x = 267,280,830,852.66
  5. Step 5: Solve for x
    x = 267,280,830,852.66/545,949.72
  6. Step 6: Final answer
    x = 489,570.41

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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.