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Finding the Fourth Proportional to 308,931.60, 463,440.60 and 131,437.20

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Solution

The fourth proportional to 308,931.60, 463,440.60 and 131,437.20 is: 197,174.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,931.60 : 463,440.60 = 131,437.20 : x
  2. Step 2: Convert to fraction form
    308,931.60/463,440.60 = 131,437.20/x
  3. Step 3: Cross multiply
    308,931.60x = 463,440.60 × 131,437.20
  4. Step 4: Simplify right side
    308,931.60x = 60,913,334,830.32
  5. Step 5: Solve for x
    x = 60,913,334,830.32/308,931.60
  6. Step 6: Final answer
    x = 197,174.18

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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.