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Finding the Fourth Proportional to 760,279.76, 1,049,219 and 420,748.12

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Solution

The fourth proportional to 760,279.76, 1,049,219 and 420,748.12 is: 580,650.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,279.76 : 1,049,219 = 420,748.12 : x
  2. Step 2: Convert to fraction form
    760,279.76/1,049,219 = 420,748.12/x
  3. Step 3: Cross multiply
    760,279.76x = 1,049,219 × 420,748.12
  4. Step 4: Simplify right side
    760,279.76x = 441,456,921,718.28
  5. Step 5: Solve for x
    x = 441,456,921,718.28/760,279.76
  6. Step 6: Final answer
    x = 580,650.63

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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.