Home / 385,155,844.88-531,470,225.43-215,619,366.20

Finding the Fourth Proportional to 385,155,844.88, 531,470,225.43 and 215,619,366.20

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Solution

The fourth proportional to 385,155,844.88, 531,470,225.43 and 215,619,366.20 is: 297,529,622.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,155,844.88 : 531,470,225.43 = 215,619,366.20 : x
  2. Step 2: Convert to fraction form
    385,155,844.88/531,470,225.43 = 215,619,366.20/x
  3. Step 3: Cross multiply
    385,155,844.88x = 531,470,225.43 × 215,619,366.20
  4. Step 4: Simplify right side
    385,155,844.88x = 114,595,273,158,730,368
  5. Step 5: Solve for x
    x = 114,595,273,158,730,368/385,155,844.88
  6. Step 6: Final answer
    x = 297,529,622.58

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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.