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Finding the Fourth Proportional to 347,970.40, 521,955.60 and 161,346.40

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Solution

The fourth proportional to 347,970.40, 521,955.60 and 161,346.40 is: 242,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,970.40 : 521,955.60 = 161,346.40 : x
  2. Step 2: Convert to fraction form
    347,970.40/521,955.60 = 161,346.40/x
  3. Step 3: Cross multiply
    347,970.40x = 521,955.60 × 161,346.40
  4. Step 4: Simplify right side
    347,970.40x = 84,215,657,019.84
  5. Step 5: Solve for x
    x = 84,215,657,019.84/347,970.40
  6. Step 6: Final answer
    x = 242,019.60

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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.