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Finding the Fourth Proportional to 349,643.20, 524,464.80 and 209,329.60

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Solution

The fourth proportional to 349,643.20, 524,464.80 and 209,329.60 is: 313,994.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,643.20 : 524,464.80 = 209,329.60 : x
  2. Step 2: Convert to fraction form
    349,643.20/524,464.80 = 209,329.60/x
  3. Step 3: Cross multiply
    349,643.20x = 524,464.80 × 209,329.60
  4. Step 4: Simplify right side
    349,643.20x = 109,786,006,798.08
  5. Step 5: Solve for x
    x = 109,786,006,798.08/349,643.20
  6. Step 6: Final answer
    x = 313,994.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.