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Finding the Fourth Proportional to 317,818.63, 438,482.64 and 179,978.71

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Solution

The fourth proportional to 317,818.63, 438,482.64 and 179,978.71 is: 248,309.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,818.63 : 438,482.64 = 179,978.71 : x
  2. Step 2: Convert to fraction form
    317,818.63/438,482.64 = 179,978.71/x
  3. Step 3: Cross multiply
    317,818.63x = 438,482.64 × 179,978.71
  4. Step 4: Simplify right side
    317,818.63x = 78,917,539,904.59
  5. Step 5: Solve for x
    x = 78,917,539,904.59/317,818.63
  6. Step 6: Final answer
    x = 248,309.99

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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.