Home / 553,749.12-764,189.65-312,018.39

Finding the Fourth Proportional to 553,749.12, 764,189.65 and 312,018.39

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Solution

The fourth proportional to 553,749.12, 764,189.65 and 312,018.39 is: 430,594.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,749.12 : 764,189.65 = 312,018.39 : x
  2. Step 2: Convert to fraction form
    553,749.12/764,189.65 = 312,018.39/x
  3. Step 3: Cross multiply
    553,749.12x = 764,189.65 × 312,018.39
  4. Step 4: Simplify right side
    553,749.12x = 238,441,224,247.66
  5. Step 5: Solve for x
    x = 238,441,224,247.66/553,749.12
  6. Step 6: Final answer
    x = 430,594.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.