Home / 1,387,257.72-2,080,886.60-389,985.72

Finding the Fourth Proportional to 1,387,257.72, 2,080,886.60 and 389,985.72

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Solution

The fourth proportional to 1,387,257.72, 2,080,886.60 and 389,985.72 is: 584,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,257.72 : 2,080,886.60 = 389,985.72 : x
  2. Step 2: Convert to fraction form
    1,387,257.72/2,080,886.60 = 389,985.72/x
  3. Step 3: Cross multiply
    1,387,257.72x = 2,080,886.60 × 389,985.72
  4. Step 4: Simplify right side
    1,387,257.72x = 811,516,058,939.35
  5. Step 5: Solve for x
    x = 811,516,058,939.35/1,387,257.72
  6. Step 6: Final answer
    x = 584,978.59

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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.