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Finding the Fourth Proportional to 341,128.40, 511,692.60 and 91,810.40

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Solution

The fourth proportional to 341,128.40, 511,692.60 and 91,810.40 is: 137,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,128.40 : 511,692.60 = 91,810.40 : x
  2. Step 2: Convert to fraction form
    341,128.40/511,692.60 = 91,810.40/x
  3. Step 3: Cross multiply
    341,128.40x = 511,692.60 × 91,810.40
  4. Step 4: Simplify right side
    341,128.40x = 46,978,702,283.04
  5. Step 5: Solve for x
    x = 46,978,702,283.04/341,128.40
  6. Step 6: Final answer
    x = 137,715.60

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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.