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Finding the Fourth Proportional to 579,428.20, 779,739.75 and 579,428.20

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Solution

The fourth proportional to 579,428.20, 779,739.75 and 579,428.20 is: 779,739.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,428.20 : 779,739.75 = 579,428.20 : x
  2. Step 2: Convert to fraction form
    579,428.20/779,739.75 = 579,428.20/x
  3. Step 3: Cross multiply
    579,428.20x = 779,739.75 × 579,428.20
  4. Step 4: Simplify right side
    579,428.20x = 451,803,199,810.95
  5. Step 5: Solve for x
    x = 451,803,199,810.95/579,428.20
  6. Step 6: Final answer
    x = 779,739.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.