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Finding the Fourth Proportional to 346,089.70, 519,134.55 and 257,516.20

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Solution

The fourth proportional to 346,089.70, 519,134.55 and 257,516.20 is: 386,274.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,089.70 : 519,134.55 = 257,516.20 : x
  2. Step 2: Convert to fraction form
    346,089.70/519,134.55 = 257,516.20/x
  3. Step 3: Cross multiply
    346,089.70x = 519,134.55 × 257,516.20
  4. Step 4: Simplify right side
    346,089.70x = 133,685,556,604.71
  5. Step 5: Solve for x
    x = 133,685,556,604.71/346,089.70
  6. Step 6: Final answer
    x = 386,274.30

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Similar ratio
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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.