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Finding the Fourth Proportional to 330,428.40, 495,642.99 and 90,544.32

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Solution

The fourth proportional to 330,428.40, 495,642.99 and 90,544.32 is: 135,816.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,428.40 : 495,642.99 = 90,544.32 : x
  2. Step 2: Convert to fraction form
    330,428.40/495,642.99 = 90,544.32/x
  3. Step 3: Cross multiply
    330,428.40x = 495,642.99 × 90,544.32
  4. Step 4: Simplify right side
    330,428.40x = 44,877,657,492.32
  5. Step 5: Solve for x
    x = 44,877,657,492.32/330,428.40
  6. Step 6: Final answer
    x = 135,816.59

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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.