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Finding the Fourth Proportional to 283,614.40, 425,421.60 and 143,646.40

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Solution

The fourth proportional to 283,614.40, 425,421.60 and 143,646.40 is: 215,469.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,614.40 : 425,421.60 = 143,646.40 : x
  2. Step 2: Convert to fraction form
    283,614.40/425,421.60 = 143,646.40/x
  3. Step 3: Cross multiply
    283,614.40x = 425,421.60 × 143,646.40
  4. Step 4: Simplify right side
    283,614.40x = 61,110,281,322.24
  5. Step 5: Solve for x
    x = 61,110,281,322.24/283,614.40
  6. Step 6: Final answer
    x = 215,469.60

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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.