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Finding the Fourth Proportional to 554,021.46, 764,503.70 and 312,363.45

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Solution

The fourth proportional to 554,021.46, 764,503.70 and 312,363.45 is: 431,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,021.46 : 764,503.70 = 312,363.45 : x
  2. Step 2: Convert to fraction form
    554,021.46/764,503.70 = 312,363.45/x
  3. Step 3: Cross multiply
    554,021.46x = 764,503.70 × 312,363.45
  4. Step 4: Simplify right side
    554,021.46x = 238,803,011,707.95
  5. Step 5: Solve for x
    x = 238,803,011,707.95/554,021.46
  6. Step 6: Final answer
    x = 431,035.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.