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Finding the Fourth Proportional to 346,855.86, 478,738.31 and 210,861

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Solution

The fourth proportional to 346,855.86, 478,738.31 and 210,861 is: 291,035.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,855.86 : 478,738.31 = 210,861 : x
  2. Step 2: Convert to fraction form
    346,855.86/478,738.31 = 210,861/x
  3. Step 3: Cross multiply
    346,855.86x = 478,738.31 × 210,861
  4. Step 4: Simplify right side
    346,855.86x = 100,947,237,730.61
  5. Step 5: Solve for x
    x = 100,947,237,730.61/346,855.86
  6. Step 6: Final answer
    x = 291,035.12

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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.