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Finding the Fourth Proportional to 807,402.60, 1,210,812.30 and 407,910.60

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Solution

The fourth proportional to 807,402.60, 1,210,812.30 and 407,910.60 is: 611,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,402.60 : 1,210,812.30 = 407,910.60 : x
  2. Step 2: Convert to fraction form
    807,402.60/1,210,812.30 = 407,910.60/x
  3. Step 3: Cross multiply
    807,402.60x = 1,210,812.30 × 407,910.60
  4. Step 4: Simplify right side
    807,402.60x = 493,903,171,780.38
  5. Step 5: Solve for x
    x = 493,903,171,780.38/807,402.60
  6. Step 6: Final answer
    x = 611,718.58

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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.