Home / 645,440.88-890,730.36-355,065.24

Finding the Fourth Proportional to 645,440.88, 890,730.36 and 355,065.24

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Solution

The fourth proportional to 645,440.88, 890,730.36 and 355,065.24 is: 490,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,440.88 : 890,730.36 = 355,065.24 : x
  2. Step 2: Convert to fraction form
    645,440.88/890,730.36 = 355,065.24/x
  3. Step 3: Cross multiply
    645,440.88x = 890,730.36 × 355,065.24
  4. Step 4: Simplify right side
    645,440.88x = 316,267,389,048.69
  5. Step 5: Solve for x
    x = 316,267,389,048.69/645,440.88
  6. Step 6: Final answer
    x = 490,002.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.