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Finding the Fourth Proportional to 346,756.54, 478,388.85 and 217,619.66

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Solution

The fourth proportional to 346,756.54, 478,388.85 and 217,619.66 is: 300,230.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,756.54 : 478,388.85 = 217,619.66 : x
  2. Step 2: Convert to fraction form
    346,756.54/478,388.85 = 217,619.66/x
  3. Step 3: Cross multiply
    346,756.54x = 478,388.85 × 217,619.66
  4. Step 4: Simplify right side
    346,756.54x = 104,106,816,492.85
  5. Step 5: Solve for x
    x = 104,106,816,492.85/346,756.54
  6. Step 6: Final answer
    x = 300,230.29

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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.