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Finding the Fourth Proportional to 283,623.40, 425,435.10 and 143,655.40

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Solution

The fourth proportional to 283,623.40, 425,435.10 and 143,655.40 is: 215,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,623.40 : 425,435.10 = 143,655.40 : x
  2. Step 2: Convert to fraction form
    283,623.40/425,435.10 = 143,655.40/x
  3. Step 3: Cross multiply
    283,623.40x = 425,435.10 × 143,655.40
  4. Step 4: Simplify right side
    283,623.40x = 61,116,049,464.54
  5. Step 5: Solve for x
    x = 61,116,049,464.54/283,623.40
  6. Step 6: Final answer
    x = 215,483.10

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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.