Home / 398,640,309.60-597,960,464.40-390,578,152.80

Finding the Fourth Proportional to 398,640,309.60, 597,960,464.40 and 390,578,152.80

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Solution

The fourth proportional to 398,640,309.60, 597,960,464.40 and 390,578,152.80 is: 585,867,229.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,640,309.60 : 597,960,464.40 = 390,578,152.80 : x
  2. Step 2: Convert to fraction form
    398,640,309.60/597,960,464.40 = 390,578,152.80/x
  3. Step 3: Cross multiply
    398,640,309.60x = 597,960,464.40 × 390,578,152.80
  4. Step 4: Simplify right side
    398,640,309.60x = 233,550,293,632,782,144
  5. Step 5: Solve for x
    x = 233,550,293,632,782,144/398,640,309.60
  6. Step 6: Final answer
    x = 585,867,229.20

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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.