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Finding the Fourth Proportional to 428,368.95, 590,959.25 and 247,037.49

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Solution

The fourth proportional to 428,368.95, 590,959.25 and 247,037.49 is: 340,802.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,368.95 : 590,959.25 = 247,037.49 : x
  2. Step 2: Convert to fraction form
    428,368.95/590,959.25 = 247,037.49/x
  3. Step 3: Cross multiply
    428,368.95x = 590,959.25 × 247,037.49
  4. Step 4: Simplify right side
    428,368.95x = 145,989,089,812.28
  5. Step 5: Solve for x
    x = 145,989,089,812.28/428,368.95
  6. Step 6: Final answer
    x = 340,802.22

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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.