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Finding the Fourth Proportional to 210,374.40, 315,561.60 and 127,430.40

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Solution

The fourth proportional to 210,374.40, 315,561.60 and 127,430.40 is: 191,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,374.40 : 315,561.60 = 127,430.40 : x
  2. Step 2: Convert to fraction form
    210,374.40/315,561.60 = 127,430.40/x
  3. Step 3: Cross multiply
    210,374.40x = 315,561.60 × 127,430.40
  4. Step 4: Simplify right side
    210,374.40x = 40,212,140,912.64
  5. Step 5: Solve for x
    x = 40,212,140,912.64/210,374.40
  6. Step 6: Final answer
    x = 191,145.60

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1.5x scale

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.