Home / 712,740.20-983,605.94-390,450.20

Finding the Fourth Proportional to 712,740.20, 983,605.94 and 390,450.20

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Solution

The fourth proportional to 712,740.20, 983,605.94 and 390,450.20 is: 538,834.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,740.20 : 983,605.94 = 390,450.20 : x
  2. Step 2: Convert to fraction form
    712,740.20/983,605.94 = 390,450.20/x
  3. Step 3: Cross multiply
    712,740.20x = 983,605.94 × 390,450.20
  4. Step 4: Simplify right side
    712,740.20x = 384,049,129,123.91
  5. Step 5: Solve for x
    x = 384,049,129,123.91/712,740.20
  6. Step 6: Final answer
    x = 538,834.67

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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.