Home / 438,436.86-657,707.13-138,931.26

Finding the Fourth Proportional to 438,436.86, 657,707.13 and 138,931.26

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Solution

The fourth proportional to 438,436.86, 657,707.13 and 138,931.26 is: 208,413.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,436.86 : 657,707.13 = 138,931.26 : x
  2. Step 2: Convert to fraction form
    438,436.86/657,707.13 = 138,931.26/x
  3. Step 3: Cross multiply
    438,436.86x = 657,707.13 × 138,931.26
  4. Step 4: Simplify right side
    438,436.86x = 91,376,080,281.88
  5. Step 5: Solve for x
    x = 91,376,080,281.88/438,436.86
  6. Step 6: Final answer
    x = 208,413.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.