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Finding the Fourth Proportional to 615,421.38, 848,611.99 and 400,162.26

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Solution

The fourth proportional to 615,421.38, 848,611.99 and 400,162.26 is: 551,788.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,421.38 : 848,611.99 = 400,162.26 : x
  2. Step 2: Convert to fraction form
    615,421.38/848,611.99 = 400,162.26/x
  3. Step 3: Cross multiply
    615,421.38x = 848,611.99 × 400,162.26
  4. Step 4: Simplify right side
    615,421.38x = 339,582,490,781.09
  5. Step 5: Solve for x
    x = 339,582,490,781.09/615,421.38
  6. Step 6: Final answer
    x = 551,788.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.