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Finding the Fourth Proportional to 686,076.01, 946,783.95 and 380,172.20

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Solution

The fourth proportional to 686,076.01, 946,783.95 and 380,172.20 is: 524,637.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,076.01 : 946,783.95 = 380,172.20 : x
  2. Step 2: Convert to fraction form
    686,076.01/946,783.95 = 380,172.20/x
  3. Step 3: Cross multiply
    686,076.01x = 946,783.95 × 380,172.20
  4. Step 4: Simplify right side
    686,076.01x = 359,940,937,196.19
  5. Step 5: Solve for x
    x = 359,940,937,196.19/686,076.01
  6. Step 6: Final answer
    x = 524,637.11

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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.