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Finding the Fourth Proportional to 611,609.10, 917,413.65 and 485,637.90

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Solution

The fourth proportional to 611,609.10, 917,413.65 and 485,637.90 is: 728,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,609.10 : 917,413.65 = 485,637.90 : x
  2. Step 2: Convert to fraction form
    611,609.10/917,413.65 = 485,637.90/x
  3. Step 3: Cross multiply
    611,609.10x = 917,413.65 × 485,637.90
  4. Step 4: Simplify right side
    611,609.10x = 445,530,838,417.34
  5. Step 5: Solve for x
    x = 445,530,838,417.34/611,609.10
  6. Step 6: Final answer
    x = 728,456.85

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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.