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Finding the Fourth Proportional to 407,718.60, 611,577.90 and 370,320.90

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Solution

The fourth proportional to 407,718.60, 611,577.90 and 370,320.90 is: 555,481.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,718.60 : 611,577.90 = 370,320.90 : x
  2. Step 2: Convert to fraction form
    407,718.60/611,577.90 = 370,320.90/x
  3. Step 3: Cross multiply
    407,718.60x = 611,577.90 × 370,320.90
  4. Step 4: Simplify right side
    407,718.60x = 226,480,078,348.11
  5. Step 5: Solve for x
    x = 226,480,078,348.11/407,718.60
  6. Step 6: Final answer
    x = 555,481.35

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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.