Home / 645,328.67-890,516.88-358,842.60

Finding the Fourth Proportional to 645,328.67, 890,516.88 and 358,842.60

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Solution

The fourth proportional to 645,328.67, 890,516.88 and 358,842.60 is: 495,182.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,328.67 : 890,516.88 = 358,842.60 : x
  2. Step 2: Convert to fraction form
    645,328.67/890,516.88 = 358,842.60/x
  3. Step 3: Cross multiply
    645,328.67x = 890,516.88 × 358,842.60
  4. Step 4: Simplify right side
    645,328.67x = 319,555,392,563.09
  5. Step 5: Solve for x
    x = 319,555,392,563.09/645,328.67
  6. Step 6: Final answer
    x = 495,182.39

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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.