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Finding the Fourth Proportional to 415,458.51, 623,292.90 and 115,939.05

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Solution

The fourth proportional to 415,458.51, 623,292.90 and 115,939.05 is: 173,937.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,458.51 : 623,292.90 = 115,939.05 : x
  2. Step 2: Convert to fraction form
    415,458.51/623,292.90 = 115,939.05/x
  3. Step 3: Cross multiply
    415,458.51x = 623,292.90 × 115,939.05
  4. Step 4: Simplify right side
    415,458.51x = 72,263,986,697.75
  5. Step 5: Solve for x
    x = 72,263,986,697.75/415,458.51
  6. Step 6: Final answer
    x = 173,937.91

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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.