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Finding the Fourth Proportional to 606,942.20, 910,413.30 and 417,985.40

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Solution

The fourth proportional to 606,942.20, 910,413.30 and 417,985.40 is: 626,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,942.20 : 910,413.30 = 417,985.40 : x
  2. Step 2: Convert to fraction form
    606,942.20/910,413.30 = 417,985.40/x
  3. Step 3: Cross multiply
    606,942.20x = 910,413.30 × 417,985.40
  4. Step 4: Simplify right side
    606,942.20x = 380,539,467,365.82
  5. Step 5: Solve for x
    x = 380,539,467,365.82/606,942.20
  6. Step 6: Final answer
    x = 626,978.10

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Similar ratio
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1.5x scale

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.