Home / 438,413.40-657,620.10-172,085.40

Finding the Fourth Proportional to 438,413.40, 657,620.10 and 172,085.40

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Solution

The fourth proportional to 438,413.40, 657,620.10 and 172,085.40 is: 258,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,413.40 : 657,620.10 = 172,085.40 : x
  2. Step 2: Convert to fraction form
    438,413.40/657,620.10 = 172,085.40/x
  3. Step 3: Cross multiply
    438,413.40x = 657,620.10 × 172,085.40
  4. Step 4: Simplify right side
    438,413.40x = 113,166,817,956.54
  5. Step 5: Solve for x
    x = 113,166,817,956.54/438,413.40
  6. Step 6: Final answer
    x = 258,128.10

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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.