Home / 420,795.74-580,630.05-239,510.45

Finding the Fourth Proportional to 420,795.74, 580,630.05 and 239,510.45

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Solution

The fourth proportional to 420,795.74, 580,630.05 and 239,510.45 is: 330,485.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,795.74 : 580,630.05 = 239,510.45 : x
  2. Step 2: Convert to fraction form
    420,795.74/580,630.05 = 239,510.45/x
  3. Step 3: Cross multiply
    420,795.74x = 580,630.05 × 239,510.45
  4. Step 4: Simplify right side
    420,795.74x = 139,066,961,655.87
  5. Step 5: Solve for x
    x = 139,066,961,655.87/420,795.74
  6. Step 6: Final answer
    x = 330,485.67

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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.