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Finding the Fourth Proportional to 478,036.36, 716,886.96 and 140,987.44

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Solution

The fourth proportional to 478,036.36, 716,886.96 and 140,987.44 is: 211,431.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,036.36 : 716,886.96 = 140,987.44 : x
  2. Step 2: Convert to fraction form
    478,036.36/716,886.96 = 140,987.44/x
  3. Step 3: Cross multiply
    478,036.36x = 716,886.96 × 140,987.44
  4. Step 4: Simplify right side
    478,036.36x = 101,072,057,259.78
  5. Step 5: Solve for x
    x = 101,072,057,259.78/478,036.36
  6. Step 6: Final answer
    x = 211,431.74

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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.