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Finding the Fourth Proportional to 673,709.80, 1,010,564.70 and 407,989.30

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Solution

The fourth proportional to 673,709.80, 1,010,564.70 and 407,989.30 is: 611,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,709.80 : 1,010,564.70 = 407,989.30 : x
  2. Step 2: Convert to fraction form
    673,709.80/1,010,564.70 = 407,989.30/x
  3. Step 3: Cross multiply
    673,709.80x = 1,010,564.70 × 407,989.30
  4. Step 4: Simplify right side
    673,709.80x = 412,299,584,557.71
  5. Step 5: Solve for x
    x = 412,299,584,557.71/673,709.80
  6. Step 6: Final answer
    x = 611,983.95

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Similar ratio
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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.