Home / 918,622.80-1,377,977.40-287,557.20

Finding the Fourth Proportional to 918,622.80, 1,377,977.40 and 287,557.20

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Solution

The fourth proportional to 918,622.80, 1,377,977.40 and 287,557.20 is: 431,349.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,622.80 : 1,377,977.40 = 287,557.20 : x
  2. Step 2: Convert to fraction form
    918,622.80/1,377,977.40 = 287,557.20/x
  3. Step 3: Cross multiply
    918,622.80x = 1,377,977.40 × 287,557.20
  4. Step 4: Simplify right side
    918,622.80x = 396,247,322,807.28
  5. Step 5: Solve for x
    x = 396,247,322,807.28/918,622.80
  6. Step 6: Final answer
    x = 431,349.32

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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.