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Finding the Fourth Proportional to 247,047.40, 370,484.70 and 128,679.40

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Solution

The fourth proportional to 247,047.40, 370,484.70 and 128,679.40 is: 192,974.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,047.40 : 370,484.70 = 128,679.40 : x
  2. Step 2: Convert to fraction form
    247,047.40/370,484.70 = 128,679.40/x
  3. Step 3: Cross multiply
    247,047.40x = 370,484.70 × 128,679.40
  4. Step 4: Simplify right side
    247,047.40x = 47,673,748,905.18
  5. Step 5: Solve for x
    x = 47,673,748,905.18/247,047.40
  6. Step 6: Final answer
    x = 192,974.10

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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.