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Finding the Fourth Proportional to 880,859.20, 1,321,807.20 and 319,950.40

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Solution

The fourth proportional to 880,859.20, 1,321,807.20 and 319,950.40 is: 480,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,859.20 : 1,321,807.20 = 319,950.40 : x
  2. Step 2: Convert to fraction form
    880,859.20/1,321,807.20 = 319,950.40/x
  3. Step 3: Cross multiply
    880,859.20x = 1,321,807.20 × 319,950.40
  4. Step 4: Simplify right side
    880,859.20x = 422,912,742,362.88
  5. Step 5: Solve for x
    x = 422,912,742,362.88/880,859.20
  6. Step 6: Final answer
    x = 480,113.90

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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.