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Finding the Fourth Proportional to 388,900, 536,623.68 and 219,130.48

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Solution

The fourth proportional to 388,900, 536,623.68 and 219,130.48 is: 302,367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,900 : 536,623.68 = 219,130.48 : x
  2. Step 2: Convert to fraction form
    388,900/536,623.68 = 219,130.48/x
  3. Step 3: Cross multiply
    388,900x = 536,623.68 × 219,130.48
  4. Step 4: Simplify right side
    388,900x = 117,590,604,577.77
  5. Step 5: Solve for x
    x = 117,590,604,577.77/388,900
  6. Step 6: Final answer
    x = 302,367.20

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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.