Home / 389,904.40-584,856.60-326,918.80

Finding the Fourth Proportional to 389,904.40, 584,856.60 and 326,918.80

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Solution

The fourth proportional to 389,904.40, 584,856.60 and 326,918.80 is: 490,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,904.40 : 584,856.60 = 326,918.80 : x
  2. Step 2: Convert to fraction form
    389,904.40/584,856.60 = 326,918.80/x
  3. Step 3: Cross multiply
    389,904.40x = 584,856.60 × 326,918.80
  4. Step 4: Simplify right side
    389,904.40x = 191,200,617,844.08
  5. Step 5: Solve for x
    x = 191,200,617,844.08/389,904.40
  6. Step 6: Final answer
    x = 490,378.20

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1.5x scale

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.