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Finding the Fourth Proportional to 779,601, 1,075,849.38 and 421,905

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Solution

The fourth proportional to 779,601, 1,075,849.38 and 421,905 is: 582,228.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,601 : 1,075,849.38 = 421,905 : x
  2. Step 2: Convert to fraction form
    779,601/1,075,849.38 = 421,905/x
  3. Step 3: Cross multiply
    779,601x = 1,075,849.38 × 421,905
  4. Step 4: Simplify right side
    779,601x = 453,906,232,668.90
  5. Step 5: Solve for x
    x = 453,906,232,668.90/779,601
  6. Step 6: Final answer
    x = 582,228.90

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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.