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Finding the Fourth Proportional to 567,499.37, 783,155.18 and 312,859.67

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Solution

The fourth proportional to 567,499.37, 783,155.18 and 312,859.67 is: 431,749.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,499.37 : 783,155.18 = 312,859.67 : x
  2. Step 2: Convert to fraction form
    567,499.37/783,155.18 = 312,859.67/x
  3. Step 3: Cross multiply
    567,499.37x = 783,155.18 × 312,859.67
  4. Step 4: Simplify right side
    567,499.37x = 245,017,668,039.96
  5. Step 5: Solve for x
    x = 245,017,668,039.96/567,499.37
  6. Step 6: Final answer
    x = 431,749.68

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Double scale
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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.