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Finding the Fourth Proportional to 478,987, 718,602.54 and 142,039.96

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Solution

The fourth proportional to 478,987, 718,602.54 and 142,039.96 is: 213,096.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,987 : 718,602.54 = 142,039.96 : x
  2. Step 2: Convert to fraction form
    478,987/718,602.54 = 142,039.96/x
  3. Step 3: Cross multiply
    478,987x = 718,602.54 × 142,039.96
  4. Step 4: Simplify right side
    478,987x = 102,070,276,037.50
  5. Step 5: Solve for x
    x = 102,070,276,037.50/478,987
  6. Step 6: Final answer
    x = 213,096.13

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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.