Home / 712,942.40-1,069,413.60-665,703.20

Finding the Fourth Proportional to 712,942.40, 1,069,413.60 and 665,703.20

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Solution

The fourth proportional to 712,942.40, 1,069,413.60 and 665,703.20 is: 998,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,942.40 : 1,069,413.60 = 665,703.20 : x
  2. Step 2: Convert to fraction form
    712,942.40/1,069,413.60 = 665,703.20/x
  3. Step 3: Cross multiply
    712,942.40x = 1,069,413.60 × 665,703.20
  4. Step 4: Simplify right side
    712,942.40x = 711,912,055,643.52
  5. Step 5: Solve for x
    x = 711,912,055,643.52/712,942.40
  6. Step 6: Final answer
    x = 998,554.80

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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.