Home / 398,640,146.40-598,128,181.20-217,017,669.60

Finding the Fourth Proportional to 398,640,146.40, 598,128,181.20 and 217,017,669.60

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Solution

The fourth proportional to 398,640,146.40, 598,128,181.20 and 217,017,669.60 is: 325,617,941.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,640,146.40 : 598,128,181.20 = 217,017,669.60 : x
  2. Step 2: Convert to fraction form
    398,640,146.40/598,128,181.20 = 217,017,669.60/x
  3. Step 3: Cross multiply
    398,640,146.40x = 598,128,181.20 × 217,017,669.60
  4. Step 4: Simplify right side
    398,640,146.40x = 129,804,384,006,110,544
  5. Step 5: Solve for x
    x = 129,804,384,006,110,544/398,640,146.40
  6. Step 6: Final answer
    x = 325,617,941.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.