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Finding the Fourth Proportional to 201,639.60, 302,459.40 and 191,798.10

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Solution

The fourth proportional to 201,639.60, 302,459.40 and 191,798.10 is: 287,697.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,639.60 : 302,459.40 = 191,798.10 : x
  2. Step 2: Convert to fraction form
    201,639.60/302,459.40 = 191,798.10/x
  3. Step 3: Cross multiply
    201,639.60x = 302,459.40 × 191,798.10
  4. Step 4: Simplify right side
    201,639.60x = 58,011,138,247.14
  5. Step 5: Solve for x
    x = 58,011,138,247.14/201,639.60
  6. Step 6: Final answer
    x = 287,697.15

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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.