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Finding the Fourth Proportional to 289,266.70, 433,900.05 and 78,904.30

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Solution

The fourth proportional to 289,266.70, 433,900.05 and 78,904.30 is: 118,356.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,266.70 : 433,900.05 = 78,904.30 : x
  2. Step 2: Convert to fraction form
    289,266.70/433,900.05 = 78,904.30/x
  3. Step 3: Cross multiply
    289,266.70x = 433,900.05 × 78,904.30
  4. Step 4: Simplify right side
    289,266.70x = 34,236,579,715.22
  5. Step 5: Solve for x
    x = 34,236,579,715.22/289,266.70
  6. Step 6: Final answer
    x = 118,356.45

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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.