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Finding the Fourth Proportional to 407,718.40, 611,577.60 and 239,319.40

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Solution

The fourth proportional to 407,718.40, 611,577.60 and 239,319.40 is: 358,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,718.40 : 611,577.60 = 239,319.40 : x
  2. Step 2: Convert to fraction form
    407,718.40/611,577.60 = 239,319.40/x
  3. Step 3: Cross multiply
    407,718.40x = 611,577.60 × 239,319.40
  4. Step 4: Simplify right side
    407,718.40x = 146,362,384,285.44
  5. Step 5: Solve for x
    x = 146,362,384,285.44/407,718.40
  6. Step 6: Final answer
    x = 358,979.10

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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.