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Finding the Fourth Proportional to 303,460.55, 455,136.15 and 190,939.40

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Solution

The fourth proportional to 303,460.55, 455,136.15 and 190,939.40 is: 286,374.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,460.55 : 455,136.15 = 190,939.40 : x
  2. Step 2: Convert to fraction form
    303,460.55/455,136.15 = 190,939.40/x
  3. Step 3: Cross multiply
    303,460.55x = 455,136.15 × 190,939.40
  4. Step 4: Simplify right side
    303,460.55x = 86,903,423,399.31
  5. Step 5: Solve for x
    x = 86,903,423,399.31/303,460.55
  6. Step 6: Final answer
    x = 286,374.70

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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.