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Finding the Fourth Proportional to 405,065.40, 607,525.20 and 255,037.20

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Solution

The fourth proportional to 405,065.40, 607,525.20 and 255,037.20 is: 382,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,065.40 : 607,525.20 = 255,037.20 : x
  2. Step 2: Convert to fraction form
    405,065.40/607,525.20 = 255,037.20/x
  3. Step 3: Cross multiply
    405,065.40x = 607,525.20 × 255,037.20
  4. Step 4: Simplify right side
    405,065.40x = 154,941,525,937.44
  5. Step 5: Solve for x
    x = 154,941,525,937.44/405,065.40
  6. Step 6: Final answer
    x = 382,509.90

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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.