Home / 287,146.31-396,155.61-286,703.45

Finding the Fourth Proportional to 287,146.31, 396,155.61 and 286,703.45

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Solution

The fourth proportional to 287,146.31, 396,155.61 and 286,703.45 is: 395,544.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,146.31 : 396,155.61 = 286,703.45 : x
  2. Step 2: Convert to fraction form
    287,146.31/396,155.61 = 286,703.45/x
  3. Step 3: Cross multiply
    287,146.31x = 396,155.61 × 286,703.45
  4. Step 4: Simplify right side
    287,146.31x = 113,579,178,143.08
  5. Step 5: Solve for x
    x = 113,579,178,143.08/287,146.31
  6. Step 6: Final answer
    x = 395,544.63

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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.