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Finding the Fourth Proportional to 486,267.68, 670,520.36 and 316,186.40

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Solution

The fourth proportional to 486,267.68, 670,520.36 and 316,186.40 is: 435,993.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,267.68 : 670,520.36 = 316,186.40 : x
  2. Step 2: Convert to fraction form
    486,267.68/670,520.36 = 316,186.40/x
  3. Step 3: Cross multiply
    486,267.68x = 670,520.36 × 316,186.40
  4. Step 4: Simplify right side
    486,267.68x = 212,009,418,755.10
  5. Step 5: Solve for x
    x = 212,009,418,755.10/486,267.68
  6. Step 6: Final answer
    x = 435,993.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.