Home / 645,219.09-890,397.41-358,736.67

Finding the Fourth Proportional to 645,219.09, 890,397.41 and 358,736.67

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Solution

The fourth proportional to 645,219.09, 890,397.41 and 358,736.67 is: 495,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,219.09 : 890,397.41 = 358,736.67 : x
  2. Step 2: Convert to fraction form
    645,219.09/890,397.41 = 358,736.67/x
  3. Step 3: Cross multiply
    645,219.09x = 890,397.41 × 358,736.67
  4. Step 4: Simplify right side
    645,219.09x = 319,418,200,046.34
  5. Step 5: Solve for x
    x = 319,418,200,046.34/645,219.09
  6. Step 6: Final answer
    x = 495,053.86

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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.