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Finding the Fourth Proportional to 351,692.64, 484,980.18 and 312,807.68

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Solution

The fourth proportional to 351,692.64, 484,980.18 and 312,807.68 is: 431,358.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,692.64 : 484,980.18 = 312,807.68 : x
  2. Step 2: Convert to fraction form
    351,692.64/484,980.18 = 312,807.68/x
  3. Step 3: Cross multiply
    351,692.64x = 484,980.18 × 312,807.68
  4. Step 4: Simplify right side
    351,692.64x = 151,705,523,172.53
  5. Step 5: Solve for x
    x = 151,705,523,172.53/351,692.64
  6. Step 6: Final answer
    x = 431,358.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.