Home / 688,986.80-1,033,413.38-209,218.76

Finding the Fourth Proportional to 688,986.80, 1,033,413.38 and 209,218.76

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Solution

The fourth proportional to 688,986.80, 1,033,413.38 and 209,218.76 is: 313,807.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,986.80 : 1,033,413.38 = 209,218.76 : x
  2. Step 2: Convert to fraction form
    688,986.80/1,033,413.38 = 209,218.76/x
  3. Step 3: Cross multiply
    688,986.80x = 1,033,413.38 × 209,218.76
  4. Step 4: Simplify right side
    688,986.80x = 216,209,465,931.01
  5. Step 5: Solve for x
    x = 216,209,465,931.01/688,986.80
  6. Step 6: Final answer
    x = 313,807.85

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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.