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Finding the Fourth Proportional to 661,408.56, 912,739.20 and 359,602.56

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Solution

The fourth proportional to 661,408.56, 912,739.20 and 359,602.56 is: 496,249.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,408.56 : 912,739.20 = 359,602.56 : x
  2. Step 2: Convert to fraction form
    661,408.56/912,739.20 = 359,602.56/x
  3. Step 3: Cross multiply
    661,408.56x = 912,739.20 × 359,602.56
  4. Step 4: Simplify right side
    661,408.56x = 328,223,352,932.35
  5. Step 5: Solve for x
    x = 328,223,352,932.35/661,408.56
  6. Step 6: Final answer
    x = 496,249.02

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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.