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Finding the Fourth Proportional to 309,609.81, 427,266.13 and 180,544.70

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Solution

The fourth proportional to 309,609.81, 427,266.13 and 180,544.70 is: 249,154.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,609.81 : 427,266.13 = 180,544.70 : x
  2. Step 2: Convert to fraction form
    309,609.81/427,266.13 = 180,544.70/x
  3. Step 3: Cross multiply
    309,609.81x = 427,266.13 × 180,544.70
  4. Step 4: Simplify right side
    309,609.81x = 77,140,635,261.01
  5. Step 5: Solve for x
    x = 77,140,635,261.01/309,609.81
  6. Step 6: Final answer
    x = 249,154.36

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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.