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Finding the Fourth Proportional to 898,756.48, 1,240,284.48 and 490,864

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Solution

The fourth proportional to 898,756.48, 1,240,284.48 and 490,864 is: 677,392.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    898,756.48 : 1,240,284.48 = 490,864 : x
  2. Step 2: Convert to fraction form
    898,756.48/1,240,284.48 = 490,864/x
  3. Step 3: Cross multiply
    898,756.48x = 1,240,284.48 × 490,864
  4. Step 4: Simplify right side
    898,756.48x = 608,811,000,990.72
  5. Step 5: Solve for x
    x = 608,811,000,990.72/898,756.48
  6. Step 6: Final answer
    x = 677,392.61

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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.