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Finding the Fourth Proportional to 353,454.50, 487,763.43 and 210,211.40

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Solution

The fourth proportional to 353,454.50, 487,763.43 and 210,211.40 is: 290,089.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,454.50 : 487,763.43 = 210,211.40 : x
  2. Step 2: Convert to fraction form
    353,454.50/487,763.43 = 210,211.40/x
  3. Step 3: Cross multiply
    353,454.50x = 487,763.43 × 210,211.40
  4. Step 4: Simplify right side
    353,454.50x = 102,533,433,489.10
  5. Step 5: Solve for x
    x = 102,533,433,489.10/353,454.50
  6. Step 6: Final answer
    x = 290,089.48

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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.