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Finding the Fourth Proportional to 660,620.25, 911,656.86 and 358,814.25

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Solution

The fourth proportional to 660,620.25, 911,656.86 and 358,814.25 is: 495,164.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,620.25 : 911,656.86 = 358,814.25 : x
  2. Step 2: Convert to fraction form
    660,620.25/911,656.86 = 358,814.25/x
  3. Step 3: Cross multiply
    660,620.25x = 911,656.86 × 358,814.25
  4. Step 4: Simplify right side
    660,620.25x = 327,115,472,478.26
  5. Step 5: Solve for x
    x = 327,115,472,478.26/660,620.25
  6. Step 6: Final answer
    x = 495,164.16

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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.