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Finding the Fourth Proportional to 358,885.80, 538,911.90 and 259,741.80

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Solution

The fourth proportional to 358,885.80, 538,911.90 and 259,741.80 is: 390,034.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,885.80 : 538,911.90 = 259,741.80 : x
  2. Step 2: Convert to fraction form
    358,885.80/538,911.90 = 259,741.80/x
  3. Step 3: Cross multiply
    358,885.80x = 538,911.90 × 259,741.80
  4. Step 4: Simplify right side
    358,885.80x = 139,977,946,947.42
  5. Step 5: Solve for x
    x = 139,977,946,947.42/358,885.80
  6. Step 6: Final answer
    x = 390,034.79

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1.5x scale

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.