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Finding the Fourth Proportional to 489,288.60, 733,932.90 and 339,989.40

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Solution

The fourth proportional to 489,288.60, 733,932.90 and 339,989.40 is: 509,984.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,288.60 : 733,932.90 = 339,989.40 : x
  2. Step 2: Convert to fraction form
    489,288.60/733,932.90 = 339,989.40/x
  3. Step 3: Cross multiply
    489,288.60x = 733,932.90 × 339,989.40
  4. Step 4: Simplify right side
    489,288.60x = 249,529,406,311.26
  5. Step 5: Solve for x
    x = 249,529,406,311.26/489,288.60
  6. Step 6: Final answer
    x = 509,984.10

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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.