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Finding the Fourth Proportional to 401,889.60, 554,342.40 and 258,422.40

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Solution

The fourth proportional to 401,889.60, 554,342.40 and 258,422.40 is: 356,452.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,889.60 : 554,342.40 = 258,422.40 : x
  2. Step 2: Convert to fraction form
    401,889.60/554,342.40 = 258,422.40/x
  3. Step 3: Cross multiply
    401,889.60x = 554,342.40 × 258,422.40
  4. Step 4: Simplify right side
    401,889.60x = 143,254,493,429.76
  5. Step 5: Solve for x
    x = 143,254,493,429.76/401,889.60
  6. Step 6: Final answer
    x = 356,452.35

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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.