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Finding the Fourth Proportional to 412,303.80, 618,455.70 and 349,318.20

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Solution

The fourth proportional to 412,303.80, 618,455.70 and 349,318.20 is: 523,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,303.80 : 618,455.70 = 349,318.20 : x
  2. Step 2: Convert to fraction form
    412,303.80/618,455.70 = 349,318.20/x
  3. Step 3: Cross multiply
    412,303.80x = 618,455.70 × 349,318.20
  4. Step 4: Simplify right side
    412,303.80x = 216,037,831,903.74
  5. Step 5: Solve for x
    x = 216,037,831,903.74/412,303.80
  6. Step 6: Final answer
    x = 523,977.30

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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.