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Finding the Fourth Proportional to 660,863.40, 911,980.26 and 359,055.24

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Solution

The fourth proportional to 660,863.40, 911,980.26 and 359,055.24 is: 495,490.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,863.40 : 911,980.26 = 359,055.24 : x
  2. Step 2: Convert to fraction form
    660,863.40/911,980.26 = 359,055.24/x
  3. Step 3: Cross multiply
    660,863.40x = 911,980.26 × 359,055.24
  4. Step 4: Simplify right side
    660,863.40x = 327,451,291,129.56
  5. Step 5: Solve for x
    x = 327,451,291,129.56/660,863.40
  6. Step 6: Final answer
    x = 495,490.13

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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.