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Finding the Fourth Proportional to 660,162.98, 911,583.38 and 418,873.70

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Solution

The fourth proportional to 660,162.98, 911,583.38 and 418,873.70 is: 578,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,162.98 : 911,583.38 = 418,873.70 : x
  2. Step 2: Convert to fraction form
    660,162.98/911,583.38 = 418,873.70/x
  3. Step 3: Cross multiply
    660,162.98x = 911,583.38 × 418,873.70
  4. Step 4: Simplify right side
    660,162.98x = 381,838,303,239.11
  5. Step 5: Solve for x
    x = 381,838,303,239.11/660,162.98
  6. Step 6: Final answer
    x = 578,400.05

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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.