Home / 385,987,981.12-532,667,528.68-209,775,985.60

Finding the Fourth Proportional to 385,987,981.12, 532,667,528.68 and 209,775,985.60

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Solution

The fourth proportional to 385,987,981.12, 532,667,528.68 and 209,775,985.60 is: 289,493,096.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,987,981.12 : 532,667,528.68 = 209,775,985.60 : x
  2. Step 2: Convert to fraction form
    385,987,981.12/532,667,528.68 = 209,775,985.60/x
  3. Step 3: Cross multiply
    385,987,981.12x = 532,667,528.68 × 209,775,985.60
  4. Step 4: Simplify right side
    385,987,981.12x = 111,740,855,825,963,264
  5. Step 5: Solve for x
    x = 111,740,855,825,963,264/385,987,981.12
  6. Step 6: Final answer
    x = 289,493,096.40

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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.