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Finding the Fourth Proportional to 360,021.80, 539,384.70 and 285,631.40

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Solution

The fourth proportional to 360,021.80, 539,384.70 and 285,631.40 is: 427,932.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    360,021.80 : 539,384.70 = 285,631.40 : x
  2. Step 2: Convert to fraction form
    360,021.80/539,384.70 = 285,631.40/x
  3. Step 3: Cross multiply
    360,021.80x = 539,384.70 × 285,631.40
  4. Step 4: Simplify right side
    360,021.80x = 154,065,206,999.58
  5. Step 5: Solve for x
    x = 154,065,206,999.58/360,021.80
  6. Step 6: Final answer
    x = 427,932.99

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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.