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Finding the Fourth Proportional to 346,861.38, 478,745.87 and 210,866.50

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Solution

The fourth proportional to 346,861.38, 478,745.87 and 210,866.50 is: 291,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,861.38 : 478,745.87 = 210,866.50 : x
  2. Step 2: Convert to fraction form
    346,861.38/478,745.87 = 210,866.50/x
  3. Step 3: Cross multiply
    346,861.38x = 478,745.87 × 210,866.50
  4. Step 4: Simplify right side
    346,861.38x = 100,951,465,996.36
  5. Step 5: Solve for x
    x = 100,951,465,996.36/346,861.38
  6. Step 6: Final answer
    x = 291,042.68

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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.