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Finding the Fourth Proportional to 707,431.12, 976,903.40 and 449,391.24

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Solution

The fourth proportional to 707,431.12, 976,903.40 and 449,391.24 is: 620,571.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,431.12 : 976,903.40 = 449,391.24 : x
  2. Step 2: Convert to fraction form
    707,431.12/976,903.40 = 449,391.24/x
  3. Step 3: Cross multiply
    707,431.12x = 976,903.40 × 449,391.24
  4. Step 4: Simplify right side
    707,431.12x = 439,011,830,286.22
  5. Step 5: Solve for x
    x = 439,011,830,286.22/707,431.12
  6. Step 6: Final answer
    x = 620,571.84

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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.