Home / 679,720.77-938,086.35-389,355.51

Finding the Fourth Proportional to 679,720.77, 938,086.35 and 389,355.51

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Solution

The fourth proportional to 679,720.77, 938,086.35 and 389,355.51 is: 537,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,720.77 : 938,086.35 = 389,355.51 : x
  2. Step 2: Convert to fraction form
    679,720.77/938,086.35 = 389,355.51/x
  3. Step 3: Cross multiply
    679,720.77x = 938,086.35 × 389,355.51
  4. Step 4: Simplify right side
    679,720.77x = 365,249,089,228.29
  5. Step 5: Solve for x
    x = 365,249,089,228.29/679,720.77
  6. Step 6: Final answer
    x = 537,351.67

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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.