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Finding the Fourth Proportional to 555,419.19, 766,478.30 and 300,770.31

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Solution

The fourth proportional to 555,419.19, 766,478.30 and 300,770.31 is: 415,062.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,419.19 : 766,478.30 = 300,770.31 : x
  2. Step 2: Convert to fraction form
    555,419.19/766,478.30 = 300,770.31/x
  3. Step 3: Cross multiply
    555,419.19x = 766,478.30 × 300,770.31
  4. Step 4: Simplify right side
    555,419.19x = 230,533,914,395.42
  5. Step 5: Solve for x
    x = 230,533,914,395.42/555,419.19
  6. Step 6: Final answer
    x = 415,062.93

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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.