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Finding the Fourth Proportional to 291,713.40, 437,570.10 and 221,729.40

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Solution

The fourth proportional to 291,713.40, 437,570.10 and 221,729.40 is: 332,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,713.40 : 437,570.10 = 221,729.40 : x
  2. Step 2: Convert to fraction form
    291,713.40/437,570.10 = 221,729.40/x
  3. Step 3: Cross multiply
    291,713.40x = 437,570.10 × 221,729.40
  4. Step 4: Simplify right side
    291,713.40x = 97,022,155,730.94
  5. Step 5: Solve for x
    x = 97,022,155,730.94/291,713.40
  6. Step 6: Final answer
    x = 332,594.10

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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.