Home / 427,354,641.87-637,438,923.53-388,122,338.66

Finding the Fourth Proportional to 427,354,641.87, 637,438,923.53 and 388,122,338.66

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Solution

The fourth proportional to 427,354,641.87, 637,438,923.53 and 388,122,338.66 is: 578,920,319.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,354,641.87 : 637,438,923.53 = 388,122,338.66 : x
  2. Step 2: Convert to fraction form
    427,354,641.87/637,438,923.53 = 388,122,338.66/x
  3. Step 3: Cross multiply
    427,354,641.87x = 637,438,923.53 × 388,122,338.66
  4. Step 4: Simplify right side
    427,354,641.87x = 247,404,285,748,248,672
  5. Step 5: Solve for x
    x = 247,404,285,748,248,672/427,354,641.87
  6. Step 6: Final answer
    x = 578,920,319.35

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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.