Home / 427,354,621.56-637,438,893.32-388,122,318.34

Finding the Fourth Proportional to 427,354,621.56, 637,438,893.32 and 388,122,318.34

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Solution

The fourth proportional to 427,354,621.56, 637,438,893.32 and 388,122,318.34 is: 578,920,289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,354,621.56 : 637,438,893.32 = 388,122,318.34 : x
  2. Step 2: Convert to fraction form
    427,354,621.56/637,438,893.32 = 388,122,318.34/x
  3. Step 3: Cross multiply
    427,354,621.56x = 637,438,893.32 × 388,122,318.34
  4. Step 4: Simplify right side
    427,354,621.56x = 247,404,261,075,442,336
  5. Step 5: Solve for x
    x = 247,404,261,075,442,336/427,354,621.56
  6. Step 6: Final answer
    x = 578,920,289.13

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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.