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Finding the Fourth Proportional to 499,915.40, 749,718.80 and 144,955.58

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Solution

The fourth proportional to 499,915.40, 749,718.80 and 144,955.58 is: 217,388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,915.40 : 749,718.80 = 144,955.58 : x
  2. Step 2: Convert to fraction form
    499,915.40/749,718.80 = 144,955.58/x
  3. Step 3: Cross multiply
    499,915.40x = 749,718.80 × 144,955.58
  4. Step 4: Simplify right side
    499,915.40x = 108,675,922,766.13
  5. Step 5: Solve for x
    x = 108,675,922,766.13/499,915.40
  6. Step 6: Final answer
    x = 217,388.63

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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.