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Finding the Fourth Proportional to 707,419.40, 976,220.34 and 385,135.88

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Solution

The fourth proportional to 707,419.40, 976,220.34 and 385,135.88 is: 531,477.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,419.40 : 976,220.34 = 385,135.88 : x
  2. Step 2: Convert to fraction form
    707,419.40/976,220.34 = 385,135.88/x
  3. Step 3: Cross multiply
    707,419.40x = 976,220.34 × 385,135.88
  4. Step 4: Simplify right side
    707,419.40x = 375,977,479,719.80
  5. Step 5: Solve for x
    x = 375,977,479,719.80/707,419.40
  6. Step 6: Final answer
    x = 531,477.48

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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.