Home / 427,327,875.63-640,990,816.88-280,700,978.63

Finding the Fourth Proportional to 427,327,875.63, 640,990,816.88 and 280,700,978.63

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Solution

The fourth proportional to 427,327,875.63, 640,990,816.88 and 280,700,978.63 is: 421,050,813.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,327,875.63 : 640,990,816.88 = 280,700,978.63 : x
  2. Step 2: Convert to fraction form
    427,327,875.63/640,990,816.88 = 280,700,978.63/x
  3. Step 3: Cross multiply
    427,327,875.63x = 640,990,816.88 × 280,700,978.63
  4. Step 4: Simplify right side
    427,327,875.63x = 179,926,749,586,450,656
  5. Step 5: Solve for x
    x = 179,926,749,586,450,656/427,327,875.63
  6. Step 6: Final answer
    x = 421,050,813.32

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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.