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Finding the Fourth Proportional to 447,079.80, 670,619.70 and 412,865.40

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Solution

The fourth proportional to 447,079.80, 670,619.70 and 412,865.40 is: 619,298.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,079.80 : 670,619.70 = 412,865.40 : x
  2. Step 2: Convert to fraction form
    447,079.80/670,619.70 = 412,865.40/x
  3. Step 3: Cross multiply
    447,079.80x = 670,619.70 × 412,865.40
  4. Step 4: Simplify right side
    447,079.80x = 276,875,670,688.38
  5. Step 5: Solve for x
    x = 276,875,670,688.38/447,079.80
  6. Step 6: Final answer
    x = 619,298.10

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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.