Home / 645,463.85-890,771.67-358,977.79

Finding the Fourth Proportional to 645,463.85, 890,771.67 and 358,977.79

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Solution

The fourth proportional to 645,463.85, 890,771.67 and 358,977.79 is: 495,406.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,463.85 : 890,771.67 = 358,977.79 : x
  2. Step 2: Convert to fraction form
    645,463.85/890,771.67 = 358,977.79/x
  3. Step 3: Cross multiply
    645,463.85x = 890,771.67 × 358,977.79
  4. Step 4: Simplify right side
    645,463.85x = 319,767,245,491.21
  5. Step 5: Solve for x
    x = 319,767,245,491.21/645,463.85
  6. Step 6: Final answer
    x = 495,406.90

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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.