Home / 645,426.63-890,676.10-358,940.57

Finding the Fourth Proportional to 645,426.63, 890,676.10 and 358,940.57

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Solution

The fourth proportional to 645,426.63, 890,676.10 and 358,940.57 is: 495,330.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,426.63 : 890,676.10 = 358,940.57 : x
  2. Step 2: Convert to fraction form
    645,426.63/890,676.10 = 358,940.57/x
  3. Step 3: Cross multiply
    645,426.63x = 890,676.10 × 358,940.57
  4. Step 4: Simplify right side
    645,426.63x = 319,699,783,014.67
  5. Step 5: Solve for x
    x = 319,699,783,014.67/645,426.63
  6. Step 6: Final answer
    x = 495,330.95

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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.