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Finding the Fourth Proportional to 661,240.40, 912,512.34 and 359,434.40

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Solution

The fourth proportional to 661,240.40, 912,512.34 and 359,434.40 is: 496,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,240.40 : 912,512.34 = 359,434.40 : x
  2. Step 2: Convert to fraction form
    661,240.40/912,512.34 = 359,434.40/x
  3. Step 3: Cross multiply
    661,240.40x = 912,512.34 × 359,434.40
  4. Step 4: Simplify right side
    661,240.40x = 327,988,325,420.50
  5. Step 5: Solve for x
    x = 327,988,325,420.50/661,240.40
  6. Step 6: Final answer
    x = 496,019.79

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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.