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Finding the Fourth Proportional to 289,328.60, 433,992.90 and 243,709.40

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Solution

The fourth proportional to 289,328.60, 433,992.90 and 243,709.40 is: 365,564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,328.60 : 433,992.90 = 243,709.40 : x
  2. Step 2: Convert to fraction form
    289,328.60/433,992.90 = 243,709.40/x
  3. Step 3: Cross multiply
    289,328.60x = 433,992.90 × 243,709.40
  4. Step 4: Simplify right side
    289,328.60x = 105,768,149,263.26
  5. Step 5: Solve for x
    x = 105,768,149,263.26/289,328.60
  6. Step 6: Final answer
    x = 365,564.10

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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.