Home / 457,619.36-686,434.88-315,426.47

Finding the Fourth Proportional to 457,619.36, 686,434.88 and 315,426.47

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Solution

The fourth proportional to 457,619.36, 686,434.88 and 315,426.47 is: 473,143.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,619.36 : 686,434.88 = 315,426.47 : x
  2. Step 2: Convert to fraction form
    457,619.36/686,434.88 = 315,426.47/x
  3. Step 3: Cross multiply
    457,619.36x = 686,434.88 × 315,426.47
  4. Step 4: Simplify right side
    457,619.36x = 216,519,728,439.67
  5. Step 5: Solve for x
    x = 216,519,728,439.67/457,619.36
  6. Step 6: Final answer
    x = 473,143.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.