Home / 287,338.56-396,420-286,895.52

Finding the Fourth Proportional to 287,338.56, 396,420 and 286,895.52

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Solution

The fourth proportional to 287,338.56, 396,420 and 286,895.52 is: 395,808.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,338.56 : 396,420 = 286,895.52 : x
  2. Step 2: Convert to fraction form
    287,338.56/396,420 = 286,895.52/x
  3. Step 3: Cross multiply
    287,338.56x = 396,420 × 286,895.52
  4. Step 4: Simplify right side
    287,338.56x = 113,731,122,038.40
  5. Step 5: Solve for x
    x = 113,731,122,038.40/287,338.56
  6. Step 6: Final answer
    x = 395,808.77

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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.