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Finding the Fourth Proportional to 291,406.60, 436,980.30 and 133,683.40

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Solution

The fourth proportional to 291,406.60, 436,980.30 and 133,683.40 is: 200,465.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,406.60 : 436,980.30 = 133,683.40 : x
  2. Step 2: Convert to fraction form
    291,406.60/436,980.30 = 133,683.40/x
  3. Step 3: Cross multiply
    291,406.60x = 436,980.30 × 133,683.40
  4. Step 4: Simplify right side
    291,406.60x = 58,417,012,237.02
  5. Step 5: Solve for x
    x = 58,417,012,237.02/291,406.60
  6. Step 6: Final answer
    x = 200,465.65

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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.