Home / 513,142.20-708,137.28-286,787.64

Finding the Fourth Proportional to 513,142.20, 708,137.28 and 286,787.64

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Solution

The fourth proportional to 513,142.20, 708,137.28 and 286,787.64 is: 395,767.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,142.20 : 708,137.28 = 286,787.64 : x
  2. Step 2: Convert to fraction form
    513,142.20/708,137.28 = 286,787.64/x
  3. Step 3: Cross multiply
    513,142.20x = 708,137.28 × 286,787.64
  4. Step 4: Simplify right side
    513,142.20x = 203,085,019,327.22
  5. Step 5: Solve for x
    x = 203,085,019,327.22/513,142.20
  6. Step 6: Final answer
    x = 395,767.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.