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Finding the Fourth Proportional to 715,955.85, 988,022.76 and 393,686.82

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Solution

The fourth proportional to 715,955.85, 988,022.76 and 393,686.82 is: 543,289.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,955.85 : 988,022.76 = 393,686.82 : x
  2. Step 2: Convert to fraction form
    715,955.85/988,022.76 = 393,686.82/x
  3. Step 3: Cross multiply
    715,955.85x = 988,022.76 × 393,686.82
  4. Step 4: Simplify right side
    715,955.85x = 388,971,538,472.02
  5. Step 5: Solve for x
    x = 388,971,538,472.02/715,955.85
  6. Step 6: Final answer
    x = 543,289.84

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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.