Home / 388,207,977.81-535,772,980.55-218,667,795.74

Finding the Fourth Proportional to 388,207,977.81, 535,772,980.55 and 218,667,795.74

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Solution

The fourth proportional to 388,207,977.81, 535,772,980.55 and 218,667,795.74 is: 301,787,452.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,207,977.81 : 535,772,980.55 = 218,667,795.74 : x
  2. Step 2: Convert to fraction form
    388,207,977.81/535,772,980.55 = 218,667,795.74/x
  3. Step 3: Cross multiply
    388,207,977.81x = 535,772,980.55 × 218,667,795.74
  4. Step 4: Simplify right side
    388,207,977.81x = 117,156,296,675,609,200
  5. Step 5: Solve for x
    x = 117,156,296,675,609,200/388,207,977.81
  6. Step 6: Final answer
    x = 301,787,452.53

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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.