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Finding the Fourth Proportional to 346,751.52, 478,385.21 and 256,324.55

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Solution

The fourth proportional to 346,751.52, 478,385.21 and 256,324.55 is: 353,630.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,751.52 : 478,385.21 = 256,324.55 : x
  2. Step 2: Convert to fraction form
    346,751.52/478,385.21 = 256,324.55/x
  3. Step 3: Cross multiply
    346,751.52x = 478,385.21 × 256,324.55
  4. Step 4: Simplify right side
    346,751.52x = 122,621,870,006.36
  5. Step 5: Solve for x
    x = 122,621,870,006.36/346,751.52
  6. Step 6: Final answer
    x = 353,630.37

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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.