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Finding the Fourth Proportional to 486,326.76, 729,483.84 and 126,465.72

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Solution

The fourth proportional to 486,326.76, 729,483.84 and 126,465.72 is: 189,696.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,326.76 : 729,483.84 = 126,465.72 : x
  2. Step 2: Convert to fraction form
    486,326.76/729,483.84 = 126,465.72/x
  3. Step 3: Cross multiply
    486,326.76x = 729,483.84 × 126,465.72
  4. Step 4: Simplify right side
    486,326.76x = 92,254,699,053.96
  5. Step 5: Solve for x
    x = 92,254,699,053.96/486,326.76
  6. Step 6: Final answer
    x = 189,696.94

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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.