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Finding the Fourth Proportional to 303,417.90, 455,187.60 and 90,185.40

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Solution

The fourth proportional to 303,417.90, 455,187.60 and 90,185.40 is: 135,296.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,417.90 : 455,187.60 = 90,185.40 : x
  2. Step 2: Convert to fraction form
    303,417.90/455,187.60 = 90,185.40/x
  3. Step 3: Cross multiply
    303,417.90x = 455,187.60 × 90,185.40
  4. Step 4: Simplify right side
    303,417.90x = 41,051,275,781.04
  5. Step 5: Solve for x
    x = 41,051,275,781.04/303,417.90
  6. Step 6: Final answer
    x = 135,296.16

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1.5x scale

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.