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Finding the Fourth Proportional to 210,330.40, 315,495.60 and 127,386.40

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Solution

The fourth proportional to 210,330.40, 315,495.60 and 127,386.40 is: 191,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,330.40 : 315,495.60 = 127,386.40 : x
  2. Step 2: Convert to fraction form
    210,330.40/315,495.60 = 127,386.40/x
  3. Step 3: Cross multiply
    210,330.40x = 315,495.60 × 127,386.40
  4. Step 4: Simplify right side
    210,330.40x = 40,189,848,699.84
  5. Step 5: Solve for x
    x = 40,189,848,699.84/210,330.40
  6. Step 6: Final answer
    x = 191,079.60

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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.