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Finding the Fourth Proportional to 491,886.63, 679,116.95 and 401,458.29

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Solution

The fourth proportional to 491,886.63, 679,116.95 and 401,458.29 is: 554,268.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,886.63 : 679,116.95 = 401,458.29 : x
  2. Step 2: Convert to fraction form
    491,886.63/679,116.95 = 401,458.29/x
  3. Step 3: Cross multiply
    491,886.63x = 679,116.95 × 401,458.29
  4. Step 4: Simplify right side
    491,886.63x = 272,637,127,449.72
  5. Step 5: Solve for x
    x = 272,637,127,449.72/491,886.63
  6. Step 6: Final answer
    x = 554,268.22

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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.