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Finding the Fourth Proportional to 403,724.60, 606,899.10 and 345,987.80

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Solution

The fourth proportional to 403,724.60, 606,899.10 and 345,987.80 is: 520,106.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,724.60 : 606,899.10 = 345,987.80 : x
  2. Step 2: Convert to fraction form
    403,724.60/606,899.10 = 345,987.80/x
  3. Step 3: Cross multiply
    403,724.60x = 606,899.10 × 345,987.80
  4. Step 4: Simplify right side
    403,724.60x = 209,979,684,430.98
  5. Step 5: Solve for x
    x = 209,979,684,430.98/403,724.60
  6. Step 6: Final answer
    x = 520,106.24

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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.