Home / 711,719.51-982,131.81-389,435.90

Finding the Fourth Proportional to 711,719.51, 982,131.81 and 389,435.90

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Solution

The fourth proportional to 711,719.51, 982,131.81 and 389,435.90 is: 537,399.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,719.51 : 982,131.81 = 389,435.90 : x
  2. Step 2: Convert to fraction form
    711,719.51/982,131.81 = 389,435.90/x
  3. Step 3: Cross multiply
    711,719.51x = 982,131.81 × 389,435.90
  4. Step 4: Simplify right side
    711,719.51x = 382,477,385,594.72
  5. Step 5: Solve for x
    x = 382,477,385,594.72/711,719.51
  6. Step 6: Final answer
    x = 537,399.05

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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.