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Finding the Fourth Proportional to 330,113.76, 455,560.65 and 186,870.66

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Solution

The fourth proportional to 330,113.76, 455,560.65 and 186,870.66 is: 257,883.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,113.76 : 455,560.65 = 186,870.66 : x
  2. Step 2: Convert to fraction form
    330,113.76/455,560.65 = 186,870.66/x
  3. Step 3: Cross multiply
    330,113.76x = 455,560.65 × 186,870.66
  4. Step 4: Simplify right side
    330,113.76x = 85,130,919,335.53
  5. Step 5: Solve for x
    x = 85,130,919,335.53/330,113.76
  6. Step 6: Final answer
    x = 257,883.58

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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.