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Finding the Fourth Proportional to 419,964.70, 629,947.05 and 260,532.40

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Solution

The fourth proportional to 419,964.70, 629,947.05 and 260,532.40 is: 390,798.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,964.70 : 629,947.05 = 260,532.40 : x
  2. Step 2: Convert to fraction form
    419,964.70/629,947.05 = 260,532.40/x
  3. Step 3: Cross multiply
    419,964.70x = 629,947.05 × 260,532.40
  4. Step 4: Simplify right side
    419,964.70x = 164,121,616,809.42
  5. Step 5: Solve for x
    x = 164,121,616,809.42/419,964.70
  6. Step 6: Final answer
    x = 390,798.60

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1.5x scale

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.