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Finding the Fourth Proportional to 309,572.16, 427,214.10 and 180,507.12

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Solution

The fourth proportional to 309,572.16, 427,214.10 and 180,507.12 is: 249,102.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,572.16 : 427,214.10 = 180,507.12 : x
  2. Step 2: Convert to fraction form
    309,572.16/427,214.10 = 180,507.12/x
  3. Step 3: Cross multiply
    309,572.16x = 427,214.10 × 180,507.12
  4. Step 4: Simplify right side
    309,572.16x = 77,115,186,814.39
  5. Step 5: Solve for x
    x = 77,115,186,814.39/309,572.16
  6. Step 6: Final answer
    x = 249,102.46

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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.