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Finding the Fourth Proportional to 671,879.40, 1,006,652.70 and 435,100.20

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Solution

The fourth proportional to 671,879.40, 1,006,652.70 and 435,100.20 is: 651,894.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,879.40 : 1,006,652.70 = 435,100.20 : x
  2. Step 2: Convert to fraction form
    671,879.40/1,006,652.70 = 435,100.20/x
  3. Step 3: Cross multiply
    671,879.40x = 1,006,652.70 × 435,100.20
  4. Step 4: Simplify right side
    671,879.40x = 437,994,791,100.54
  5. Step 5: Solve for x
    x = 437,994,791,100.54/671,879.40
  6. Step 6: Final answer
    x = 651,894.95

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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.