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Finding the Fourth Proportional to 390,276.88, 536,514.50 and 335,628.88

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Solution

The fourth proportional to 390,276.88, 536,514.50 and 335,628.88 is: 461,389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,276.88 : 536,514.50 = 335,628.88 : x
  2. Step 2: Convert to fraction form
    390,276.88/536,514.50 = 335,628.88/x
  3. Step 3: Cross multiply
    390,276.88x = 536,514.50 × 335,628.88
  4. Step 4: Simplify right side
    390,276.88x = 180,069,760,738.76
  5. Step 5: Solve for x
    x = 180,069,760,738.76/390,276.88
  6. Step 6: Final answer
    x = 461,389.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.