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Finding the Fourth Proportional to 486,639.64, 725,461.16 and 478,970.56

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Solution

The fourth proportional to 486,639.64, 725,461.16 and 478,970.56 is: 714,028.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,639.64 : 725,461.16 = 478,970.56 : x
  2. Step 2: Convert to fraction form
    486,639.64/725,461.16 = 478,970.56/x
  3. Step 3: Cross multiply
    486,639.64x = 725,461.16 × 478,970.56
  4. Step 4: Simplify right side
    486,639.64x = 347,474,538,063.45
  5. Step 5: Solve for x
    x = 347,474,538,063.45/486,639.64
  6. Step 6: Final answer
    x = 714,028.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.