Home / 1,413.50-2,124.30-1,405.40

Finding the Fourth Proportional to 1,413.50, 2,124.30 and 1,405.40

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Solution

The fourth proportional to 1,413.50, 2,124.30 and 1,405.40 is: 2,112.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.50 : 2,124.30 = 1,405.40 : x
  2. Step 2: Convert to fraction form
    1,413.50/2,124.30 = 1,405.40/x
  3. Step 3: Cross multiply
    1,413.50x = 2,124.30 × 1,405.40
  4. Step 4: Simplify right side
    1,413.50x = 2,985,491.22
  5. Step 5: Solve for x
    x = 2,985,491.22/1,413.50
  6. Step 6: Final answer
    x = 2,112.13

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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.