Home / 509,905.52-764,748.93-210,308.39

Finding the Fourth Proportional to 509,905.52, 764,748.93 and 210,308.39

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Solution

The fourth proportional to 509,905.52, 764,748.93 and 210,308.39 is: 315,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,905.52 : 764,748.93 = 210,308.39 : x
  2. Step 2: Convert to fraction form
    509,905.52/764,748.93 = 210,308.39/x
  3. Step 3: Cross multiply
    509,905.52x = 764,748.93 × 210,308.39
  4. Step 4: Simplify right side
    509,905.52x = 160,833,116,222.52
  5. Step 5: Solve for x
    x = 160,833,116,222.52/509,905.52
  6. Step 6: Final answer
    x = 315,417.48

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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.