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Finding the Fourth Proportional to 486,638.64, 725,459.68 and 478,969.56

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Solution

The fourth proportional to 486,638.64, 725,459.68 and 478,969.56 is: 714,026.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,638.64 : 725,459.68 = 478,969.56 : x
  2. Step 2: Convert to fraction form
    486,638.64/725,459.68 = 478,969.56/x
  3. Step 3: Cross multiply
    486,638.64x = 725,459.68 × 478,969.56
  4. Step 4: Simplify right side
    486,638.64x = 347,473,103,727.34
  5. Step 5: Solve for x
    x = 347,473,103,727.34/486,638.64
  6. Step 6: Final answer
    x = 714,026.95

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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.