Home / 427,354,643.37-637,438,925.76-388,122,340.15

Finding the Fourth Proportional to 427,354,643.37, 637,438,925.76 and 388,122,340.15

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Solution

The fourth proportional to 427,354,643.37, 637,438,925.76 and 388,122,340.15 is: 578,920,321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,354,643.37 : 637,438,925.76 = 388,122,340.15 : x
  2. Step 2: Convert to fraction form
    427,354,643.37/637,438,925.76 = 388,122,340.15/x
  3. Step 3: Cross multiply
    427,354,643.37x = 637,438,925.76 × 388,122,340.15
  4. Step 4: Simplify right side
    427,354,643.37x = 247,404,287,567,079,712
  5. Step 5: Solve for x
    x = 247,404,287,567,079,712/427,354,643.37
  6. Step 6: Final answer
    x = 578,920,321.58

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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.