Home / 642,394.80-886,522.32-355,946.40

Finding the Fourth Proportional to 642,394.80, 886,522.32 and 355,946.40

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Solution

The fourth proportional to 642,394.80, 886,522.32 and 355,946.40 is: 491,215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,394.80 : 886,522.32 = 355,946.40 : x
  2. Step 2: Convert to fraction form
    642,394.80/886,522.32 = 355,946.40/x
  3. Step 3: Cross multiply
    642,394.80x = 886,522.32 × 355,946.40
  4. Step 4: Simplify right side
    642,394.80x = 315,554,428,323.65
  5. Step 5: Solve for x
    x = 315,554,428,323.65/642,394.80
  6. Step 6: Final answer
    x = 491,215.73

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1.5x scale

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.