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Finding the Fourth Proportional to 218,155.07, 300,805.79 and 153,603.68

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Solution

The fourth proportional to 218,155.07, 300,805.79 and 153,603.68 is: 211,798.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,155.07 : 300,805.79 = 153,603.68 : x
  2. Step 2: Convert to fraction form
    218,155.07/300,805.79 = 153,603.68/x
  3. Step 3: Cross multiply
    218,155.07x = 300,805.79 × 153,603.68
  4. Step 4: Simplify right side
    218,155.07x = 46,204,874,037.26
  5. Step 5: Solve for x
    x = 46,204,874,037.26/218,155.07
  6. Step 6: Final answer
    x = 211,798.30

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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.