Home / 712,623.54-983,420.91-390,339.03

Finding the Fourth Proportional to 712,623.54, 983,420.91 and 390,339.03

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Solution

The fourth proportional to 712,623.54, 983,420.91 and 390,339.03 is: 538,668.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,623.54 : 983,420.91 = 390,339.03 : x
  2. Step 2: Convert to fraction form
    712,623.54/983,420.91 = 390,339.03/x
  3. Step 3: Cross multiply
    712,623.54x = 983,420.91 × 390,339.03
  4. Step 4: Simplify right side
    712,623.54x = 383,867,564,091.12
  5. Step 5: Solve for x
    x = 383,867,564,091.12/712,623.54
  6. Step 6: Final answer
    x = 538,668.09

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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.