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Finding the Fourth Proportional to 559,643.63, 772,313.67 and 305,000.28

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Solution

The fourth proportional to 559,643.63, 772,313.67 and 305,000.28 is: 420,903.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,643.63 : 772,313.67 = 305,000.28 : x
  2. Step 2: Convert to fraction form
    559,643.63/772,313.67 = 305,000.28/x
  3. Step 3: Cross multiply
    559,643.63x = 772,313.67 × 305,000.28
  4. Step 4: Simplify right side
    559,643.63x = 235,555,885,597.83
  5. Step 5: Solve for x
    x = 235,555,885,597.83/559,643.63
  6. Step 6: Final answer
    x = 420,903.37

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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.