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Finding the Fourth Proportional to 668,664.40, 1,002,413.40 and 402,530.80

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Solution

The fourth proportional to 668,664.40, 1,002,413.40 and 402,530.80 is: 603,445.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,664.40 : 1,002,413.40 = 402,530.80 : x
  2. Step 2: Convert to fraction form
    668,664.40/1,002,413.40 = 402,530.80/x
  3. Step 3: Cross multiply
    668,664.40x = 1,002,413.40 × 402,530.80
  4. Step 4: Simplify right side
    668,664.40x = 403,502,267,832.72
  5. Step 5: Solve for x
    x = 403,502,267,832.72/668,664.40
  6. Step 6: Final answer
    x = 603,445.12

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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.