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Finding the Fourth Proportional to 660,042.88, 910,860 and 358,236.96

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Solution

The fourth proportional to 660,042.88, 910,860 and 358,236.96 is: 494,367.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,042.88 : 910,860 = 358,236.96 : x
  2. Step 2: Convert to fraction form
    660,042.88/910,860 = 358,236.96/x
  3. Step 3: Cross multiply
    660,042.88x = 910,860 × 358,236.96
  4. Step 4: Simplify right side
    660,042.88x = 326,303,717,385.60
  5. Step 5: Solve for x
    x = 326,303,717,385.60/660,042.88
  6. Step 6: Final answer
    x = 494,367.45

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1.5x scale

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.