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Finding the Fourth Proportional to 663,686.56, 915,888.36 and 361,880.56

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Solution

The fourth proportional to 663,686.56, 915,888.36 and 361,880.56 is: 499,395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,686.56 : 915,888.36 = 361,880.56 : x
  2. Step 2: Convert to fraction form
    663,686.56/915,888.36 = 361,880.56/x
  3. Step 3: Cross multiply
    663,686.56x = 915,888.36 × 361,880.56
  4. Step 4: Simplify right side
    663,686.56x = 331,442,192,614.28
  5. Step 5: Solve for x
    x = 331,442,192,614.28/663,686.56
  6. Step 6: Final answer
    x = 499,395.67

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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.