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Finding the Fourth Proportional to 660,573.84, 911,593.64 and 388,651.98

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Solution

The fourth proportional to 660,573.84, 911,593.64 and 388,651.98 is: 536,340.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,573.84 : 911,593.64 = 388,651.98 : x
  2. Step 2: Convert to fraction form
    660,573.84/911,593.64 = 388,651.98/x
  3. Step 3: Cross multiply
    660,573.84x = 911,593.64 × 388,651.98
  4. Step 4: Simplify right side
    660,573.84x = 354,292,673,141.41
  5. Step 5: Solve for x
    x = 354,292,673,141.41/660,573.84
  6. Step 6: Final answer
    x = 536,340.76

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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.