Home / 1,413.05-2,117.95-631.40

Finding the Fourth Proportional to 1,413.05, 2,117.95 and 631.40

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Solution

The fourth proportional to 1,413.05, 2,117.95 and 631.40 is: 946.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.05 : 2,117.95 = 631.40 : x
  2. Step 2: Convert to fraction form
    1,413.05/2,117.95 = 631.40/x
  3. Step 3: Cross multiply
    1,413.05x = 2,117.95 × 631.40
  4. Step 4: Simplify right side
    1,413.05x = 1,337,261.46
  5. Step 5: Solve for x
    x = 1,337,261.46/1,413.05
  6. Step 6: Final answer
    x = 946.37

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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.