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Finding the Fourth Proportional to 661,763.12, 913,238.35 and 359,957.12

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Solution

The fourth proportional to 661,763.12, 913,238.35 and 359,957.12 is: 496,743.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,763.12 : 913,238.35 = 359,957.12 : x
  2. Step 2: Convert to fraction form
    661,763.12/913,238.35 = 359,957.12/x
  3. Step 3: Cross multiply
    661,763.12x = 913,238.35 × 359,957.12
  4. Step 4: Simplify right side
    661,763.12x = 328,726,640,873.47
  5. Step 5: Solve for x
    x = 328,726,640,873.47/661,763.12
  6. Step 6: Final answer
    x = 496,743.67

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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.