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Finding the Fourth Proportional to 612,643.14, 845,323.44 and 357,945.12

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Solution

The fourth proportional to 612,643.14, 845,323.44 and 357,945.12 is: 493,891.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,643.14 : 845,323.44 = 357,945.12 : x
  2. Step 2: Convert to fraction form
    612,643.14/845,323.44 = 357,945.12/x
  3. Step 3: Cross multiply
    612,643.14x = 845,323.44 × 357,945.12
  4. Step 4: Simplify right side
    612,643.14x = 302,579,400,169.61
  5. Step 5: Solve for x
    x = 302,579,400,169.61/612,643.14
  6. Step 6: Final answer
    x = 493,891.76

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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.