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Finding the Fourth Proportional to 405,877.40, 607,649.70 and 248,413.40

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Solution

The fourth proportional to 405,877.40, 607,649.70 and 248,413.40 is: 371,906.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,877.40 : 607,649.70 = 248,413.40 : x
  2. Step 2: Convert to fraction form
    405,877.40/607,649.70 = 248,413.40/x
  3. Step 3: Cross multiply
    405,877.40x = 607,649.70 × 248,413.40
  4. Step 4: Simplify right side
    405,877.40x = 150,948,327,985.98
  5. Step 5: Solve for x
    x = 150,948,327,985.98/405,877.40
  6. Step 6: Final answer
    x = 371,906.22

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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.