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Finding the Fourth Proportional to 491,844.80, 679,059.60 and 401,416.72

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Solution

The fourth proportional to 491,844.80, 679,059.60 and 401,416.72 is: 554,211.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,844.80 : 679,059.60 = 401,416.72 : x
  2. Step 2: Convert to fraction form
    491,844.80/679,059.60 = 401,416.72/x
  3. Step 3: Cross multiply
    491,844.80x = 679,059.60 × 401,416.72
  4. Step 4: Simplify right side
    491,844.80x = 272,585,877,316.51
  5. Step 5: Solve for x
    x = 272,585,877,316.51/491,844.80
  6. Step 6: Final answer
    x = 554,211.16

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1.5x scale

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.