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Finding the Fourth Proportional to 330,431.06, 495,646.97 and 90,547.00

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Solution

The fourth proportional to 330,431.06, 495,646.97 and 90,547.00 is: 135,820.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,431.06 : 495,646.97 = 90,547.00 : x
  2. Step 2: Convert to fraction form
    330,431.06/495,646.97 = 90,547.00/x
  3. Step 3: Cross multiply
    330,431.06x = 495,646.97 × 90,547.00
  4. Step 4: Simplify right side
    330,431.06x = 44,879,344,500.74
  5. Step 5: Solve for x
    x = 44,879,344,500.74/330,431.06
  6. Step 6: Final answer
    x = 135,820.60

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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.