Home / 280,256,710.80-420,385,066.20-264,384,339.60

Finding the Fourth Proportional to 280,256,710.80, 420,385,066.20 and 264,384,339.60

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Solution

The fourth proportional to 280,256,710.80, 420,385,066.20 and 264,384,339.60 is: 396,576,509.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,256,710.80 : 420,385,066.20 = 264,384,339.60 : x
  2. Step 2: Convert to fraction form
    280,256,710.80/420,385,066.20 = 264,384,339.60/x
  3. Step 3: Cross multiply
    280,256,710.80x = 420,385,066.20 × 264,384,339.60
  4. Step 4: Simplify right side
    280,256,710.80x = 111,143,228,104,989,280
  5. Step 5: Solve for x
    x = 111,143,228,104,989,280/280,256,710.80
  6. Step 6: Final answer
    x = 396,576,509.40

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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.