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Finding the Fourth Proportional to 286,812.76, 395,811.21 and 157,756.69

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Solution

The fourth proportional to 286,812.76, 395,811.21 and 157,756.69 is: 217,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,812.76 : 395,811.21 = 157,756.69 : x
  2. Step 2: Convert to fraction form
    286,812.76/395,811.21 = 157,756.69/x
  3. Step 3: Cross multiply
    286,812.76x = 395,811.21 × 157,756.69
  4. Step 4: Simplify right side
    286,812.76x = 62,441,866,354.49
  5. Step 5: Solve for x
    x = 62,441,866,354.49/286,812.76
  6. Step 6: Final answer
    x = 217,709.51

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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.