Home / 1,152,121.80-1,728,182.70-678,563.40

Finding the Fourth Proportional to 1,152,121.80, 1,728,182.70 and 678,563.40

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Solution

The fourth proportional to 1,152,121.80, 1,728,182.70 and 678,563.40 is: 1,017,845.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152,121.80 : 1,728,182.70 = 678,563.40 : x
  2. Step 2: Convert to fraction form
    1,152,121.80/1,728,182.70 = 678,563.40/x
  3. Step 3: Cross multiply
    1,152,121.80x = 1,728,182.70 × 678,563.40
  4. Step 4: Simplify right side
    1,152,121.80x = 1,172,681,528,733.18
  5. Step 5: Solve for x
    x = 1,172,681,528,733.18/1,152,121.80
  6. Step 6: Final answer
    x = 1,017,845.10

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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.