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Finding the Fourth Proportional to 285,292.95, 427,939.02 and 85,613.01

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Solution

The fourth proportional to 285,292.95, 427,939.02 and 85,613.01 is: 128,419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,292.95 : 427,939.02 = 85,613.01 : x
  2. Step 2: Convert to fraction form
    285,292.95/427,939.02 = 85,613.01/x
  3. Step 3: Cross multiply
    285,292.95x = 427,939.02 × 85,613.01
  4. Step 4: Simplify right side
    285,292.95x = 36,637,147,598.65
  5. Step 5: Solve for x
    x = 36,637,147,598.65/285,292.95
  6. Step 6: Final answer
    x = 128,419.39

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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.