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Finding the Fourth Proportional to 660,352.84, 990,480.80 and 210,953.02

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Solution

The fourth proportional to 660,352.84, 990,480.80 and 210,953.02 is: 316,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,352.84 : 990,480.80 = 210,953.02 : x
  2. Step 2: Convert to fraction form
    660,352.84/990,480.80 = 210,953.02/x
  3. Step 3: Cross multiply
    660,352.84x = 990,480.80 × 210,953.02
  4. Step 4: Simplify right side
    660,352.84x = 208,944,916,012.02
  5. Step 5: Solve for x
    x = 208,944,916,012.02/660,352.84
  6. Step 6: Final answer
    x = 316,414.05

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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.