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Finding the Fourth Proportional to 289,875.28, 434,814.20 and 79,515.60

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Solution

The fourth proportional to 289,875.28, 434,814.20 and 79,515.60 is: 119,273.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,875.28 : 434,814.20 = 79,515.60 : x
  2. Step 2: Convert to fraction form
    289,875.28/434,814.20 = 79,515.60/x
  3. Step 3: Cross multiply
    289,875.28x = 434,814.20 × 79,515.60
  4. Step 4: Simplify right side
    289,875.28x = 34,574,512,001.52
  5. Step 5: Solve for x
    x = 34,574,512,001.52/289,875.28
  6. Step 6: Final answer
    x = 119,273.75

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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.