Home / 645,141.26-890,244.51-358,643.90

Finding the Fourth Proportional to 645,141.26, 890,244.51 and 358,643.90

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Solution

The fourth proportional to 645,141.26, 890,244.51 and 358,643.90 is: 494,900.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,141.26 : 890,244.51 = 358,643.90 : x
  2. Step 2: Convert to fraction form
    645,141.26/890,244.51 = 358,643.90/x
  3. Step 3: Cross multiply
    645,141.26x = 890,244.51 × 358,643.90
  4. Step 4: Simplify right side
    645,141.26x = 319,280,763,019.99
  5. Step 5: Solve for x
    x = 319,280,763,019.99/645,141.26
  6. Step 6: Final answer
    x = 494,900.55

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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.