Home / 918,628.80-1,377,986.40-287,563.20

Finding the Fourth Proportional to 918,628.80, 1,377,986.40 and 287,563.20

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Solution

The fourth proportional to 918,628.80, 1,377,986.40 and 287,563.20 is: 431,358.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,628.80 : 1,377,986.40 = 287,563.20 : x
  2. Step 2: Convert to fraction form
    918,628.80/1,377,986.40 = 287,563.20/x
  3. Step 3: Cross multiply
    918,628.80x = 1,377,986.40 × 287,563.20
  4. Step 4: Simplify right side
    918,628.80x = 396,258,178,740.48
  5. Step 5: Solve for x
    x = 396,258,178,740.48/918,628.80
  6. Step 6: Final answer
    x = 431,358.32

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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.