Home / 385,628.40-578,442.60-326,725.20

Finding the Fourth Proportional to 385,628.40, 578,442.60 and 326,725.20

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Solution

The fourth proportional to 385,628.40, 578,442.60 and 326,725.20 is: 490,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,628.40 : 578,442.60 = 326,725.20 : x
  2. Step 2: Convert to fraction form
    385,628.40/578,442.60 = 326,725.20/x
  3. Step 3: Cross multiply
    385,628.40x = 578,442.60 × 326,725.20
  4. Step 4: Simplify right side
    385,628.40x = 188,991,774,173.52
  5. Step 5: Solve for x
    x = 188,991,774,173.52/385,628.40
  6. Step 6: Final answer
    x = 490,087.80

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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.