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Finding the Fourth Proportional to 287,486.80, 432,007.80 and 253,272.40

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Solution

The fourth proportional to 287,486.80, 432,007.80 and 253,272.40 is: 380,593.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,486.80 : 432,007.80 = 253,272.40 : x
  2. Step 2: Convert to fraction form
    287,486.80/432,007.80 = 253,272.40/x
  3. Step 3: Cross multiply
    287,486.80x = 432,007.80 × 253,272.40
  4. Step 4: Simplify right side
    287,486.80x = 109,415,652,324.72
  5. Step 5: Solve for x
    x = 109,415,652,324.72/287,486.80
  6. Step 6: Final answer
    x = 380,593.66

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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.