Home / 509,903.10-764,927.55-172,959.30

Finding the Fourth Proportional to 509,903.10, 764,927.55 and 172,959.30

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Solution

The fourth proportional to 509,903.10, 764,927.55 and 172,959.30 is: 259,463.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,903.10 : 764,927.55 = 172,959.30 : x
  2. Step 2: Convert to fraction form
    509,903.10/764,927.55 = 172,959.30/x
  3. Step 3: Cross multiply
    509,903.10x = 764,927.55 × 172,959.30
  4. Step 4: Simplify right side
    509,903.10x = 132,301,333,598.72
  5. Step 5: Solve for x
    x = 132,301,333,598.72/509,903.10
  6. Step 6: Final answer
    x = 259,463.68

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Double scale
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Similar ratio
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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.