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Finding the Fourth Proportional to 405,634.40, 609,488.40 and 360,015.20

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Solution

The fourth proportional to 405,634.40, 609,488.40 and 360,015.20 is: 540,943.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,634.40 : 609,488.40 = 360,015.20 : x
  2. Step 2: Convert to fraction form
    405,634.40/609,488.40 = 360,015.20/x
  3. Step 3: Cross multiply
    405,634.40x = 609,488.40 × 360,015.20
  4. Step 4: Simplify right side
    405,634.40x = 219,425,088,223.68
  5. Step 5: Solve for x
    x = 219,425,088,223.68/405,634.40
  6. Step 6: Final answer
    x = 540,943.00

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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.