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Finding the Fourth Proportional to 710,878.28, 981,011.76 and 388,589.60

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Solution

The fourth proportional to 710,878.28, 981,011.76 and 388,589.60 is: 536,253.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,878.28 : 981,011.76 = 388,589.60 : x
  2. Step 2: Convert to fraction form
    710,878.28/981,011.76 = 388,589.60/x
  3. Step 3: Cross multiply
    710,878.28x = 981,011.76 × 388,589.60
  4. Step 4: Simplify right side
    710,878.28x = 381,210,968,409.01
  5. Step 5: Solve for x
    x = 381,210,968,409.01/710,878.28
  6. Step 6: Final answer
    x = 536,253.51

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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.