Home / 674,639.80-1,011,311.70-390,038.20

Finding the Fourth Proportional to 674,639.80, 1,011,311.70 and 390,038.20

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Solution

The fourth proportional to 674,639.80, 1,011,311.70 and 390,038.20 is: 584,682.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,639.80 : 1,011,311.70 = 390,038.20 : x
  2. Step 2: Convert to fraction form
    674,639.80/1,011,311.70 = 390,038.20/x
  3. Step 3: Cross multiply
    674,639.80x = 1,011,311.70 × 390,038.20
  4. Step 4: Simplify right side
    674,639.80x = 394,450,195,106.94
  5. Step 5: Solve for x
    x = 394,450,195,106.94/674,639.80
  6. Step 6: Final answer
    x = 584,682.66

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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.