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Finding the Fourth Proportional to 545,309.10, 817,963.65 and 309,113.10

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Solution

The fourth proportional to 545,309.10, 817,963.65 and 309,113.10 is: 463,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,309.10 : 817,963.65 = 309,113.10 : x
  2. Step 2: Convert to fraction form
    545,309.10/817,963.65 = 309,113.10/x
  3. Step 3: Cross multiply
    545,309.10x = 817,963.65 × 309,113.10
  4. Step 4: Simplify right side
    545,309.10x = 252,843,279,538.82
  5. Step 5: Solve for x
    x = 252,843,279,538.82/545,309.10
  6. Step 6: Final answer
    x = 463,669.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.