Home / 290,305,475.80-435,657,279.30-128,863,274.20

Finding the Fourth Proportional to 290,305,475.80, 435,657,279.30 and 128,863,274.20

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Solution

The fourth proportional to 290,305,475.80, 435,657,279.30 and 128,863,274.20 is: 193,383,274.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,305,475.80 : 435,657,279.30 = 128,863,274.20 : x
  2. Step 2: Convert to fraction form
    290,305,475.80/435,657,279.30 = 128,863,274.20/x
  3. Step 3: Cross multiply
    290,305,475.80x = 435,657,279.30 × 128,863,274.20
  4. Step 4: Simplify right side
    290,305,475.80x = 56,140,223,439,661,888
  5. Step 5: Solve for x
    x = 56,140,223,439,661,888/290,305,475.80
  6. Step 6: Final answer
    x = 193,383,274.24

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