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Finding the Fourth Proportional to 210,035.20, 315,052.80 and 207,270.40

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Solution

The fourth proportional to 210,035.20, 315,052.80 and 207,270.40 is: 310,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,035.20 : 315,052.80 = 207,270.40 : x
  2. Step 2: Convert to fraction form
    210,035.20/315,052.80 = 207,270.40/x
  3. Step 3: Cross multiply
    210,035.20x = 315,052.80 × 207,270.40
  4. Step 4: Simplify right side
    210,035.20x = 65,301,119,877.12
  5. Step 5: Solve for x
    x = 65,301,119,877.12/210,035.20
  6. Step 6: Final answer
    x = 310,905.60

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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.