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Finding the Fourth Proportional to 660,013.30, 910,818.72 and 358,207.30

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Solution

The fourth proportional to 660,013.30, 910,818.72 and 358,207.30 is: 494,326.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,013.30 : 910,818.72 = 358,207.30 : x
  2. Step 2: Convert to fraction form
    660,013.30/910,818.72 = 358,207.30/x
  3. Step 3: Cross multiply
    660,013.30x = 910,818.72 × 358,207.30
  4. Step 4: Simplify right side
    660,013.30x = 326,261,914,480.66
  5. Step 5: Solve for x
    x = 326,261,914,480.66/660,013.30
  6. Step 6: Final answer
    x = 494,326.27

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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.