Home / 311,615,440-430,041,969.12-172,383,801.28

Finding the Fourth Proportional to 311,615,440, 430,041,969.12 and 172,383,801.28

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Solution

The fourth proportional to 311,615,440, 430,041,969.12 and 172,383,801.28 is: 237,896,650.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,615,440 : 430,041,969.12 = 172,383,801.28 : x
  2. Step 2: Convert to fraction form
    311,615,440/430,041,969.12 = 172,383,801.28/x
  3. Step 3: Cross multiply
    311,615,440x = 430,041,969.12 × 172,383,801.28
  4. Step 4: Simplify right side
    311,615,440x = 74,132,269,346,841,984
  5. Step 5: Solve for x
    x = 74,132,269,346,841,984/311,615,440
  6. Step 6: Final answer
    x = 237,896,650.26

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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.