Home / 427,354,640.37-637,438,921.29-388,122,337.15

Finding the Fourth Proportional to 427,354,640.37, 637,438,921.29 and 388,122,337.15

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Solution

The fourth proportional to 427,354,640.37, 637,438,921.29 and 388,122,337.15 is: 578,920,317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,354,640.37 : 637,438,921.29 = 388,122,337.15 : x
  2. Step 2: Convert to fraction form
    427,354,640.37/637,438,921.29 = 388,122,337.15/x
  3. Step 3: Cross multiply
    427,354,640.37x = 637,438,921.29 × 388,122,337.15
  4. Step 4: Simplify right side
    427,354,640.37x = 247,404,283,919,856,064
  5. Step 5: Solve for x
    x = 247,404,283,919,856,064/427,354,640.37
  6. Step 6: Final answer
    x = 578,920,317.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.