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Finding the Fourth Proportional to 640,012.80, 957,686.40 and 584,025.60

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Solution

The fourth proportional to 640,012.80, 957,686.40 and 584,025.60 is: 873,909.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,012.80 : 957,686.40 = 584,025.60 : x
  2. Step 2: Convert to fraction form
    640,012.80/957,686.40 = 584,025.60/x
  3. Step 3: Cross multiply
    640,012.80x = 957,686.40 × 584,025.60
  4. Step 4: Simplify right side
    640,012.80x = 559,313,374,371.84
  5. Step 5: Solve for x
    x = 559,313,374,371.84/640,012.80
  6. Step 6: Final answer
    x = 873,909.67

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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.