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Finding the Fourth Proportional to 659,621.80, 989,432.70 and 447,045.40

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Solution

The fourth proportional to 659,621.80, 989,432.70 and 447,045.40 is: 670,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,621.80 : 989,432.70 = 447,045.40 : x
  2. Step 2: Convert to fraction form
    659,621.80/989,432.70 = 447,045.40/x
  3. Step 3: Cross multiply
    659,621.80x = 989,432.70 × 447,045.40
  4. Step 4: Simplify right side
    659,621.80x = 442,321,337,144.58
  5. Step 5: Solve for x
    x = 442,321,337,144.58/659,621.80
  6. Step 6: Final answer
    x = 670,568.10

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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.