Home / 370,953,007.20-556,429,510.80-128,640,405.60

Finding the Fourth Proportional to 370,953,007.20, 556,429,510.80 and 128,640,405.60

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Solution

The fourth proportional to 370,953,007.20, 556,429,510.80 and 128,640,405.60 is: 192,960,608.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,953,007.20 : 556,429,510.80 = 128,640,405.60 : x
  2. Step 2: Convert to fraction form
    370,953,007.20/556,429,510.80 = 128,640,405.60/x
  3. Step 3: Cross multiply
    370,953,007.20x = 556,429,510.80 × 128,640,405.60
  4. Step 4: Simplify right side
    370,953,007.20x = 71,579,317,957,121,568
  5. Step 5: Solve for x
    x = 71,579,317,957,121,568/370,953,007.20
  6. Step 6: Final answer
    x = 192,960,608.40

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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.