Home / 645,485.90-890,708.22-373,499.66

Finding the Fourth Proportional to 645,485.90, 890,708.22 and 373,499.66

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Solution

The fourth proportional to 645,485.90, 890,708.22 and 373,499.66 is: 515,393.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,485.90 : 890,708.22 = 373,499.66 : x
  2. Step 2: Convert to fraction form
    645,485.90/890,708.22 = 373,499.66/x
  3. Step 3: Cross multiply
    645,485.90x = 890,708.22 × 373,499.66
  4. Step 4: Simplify right side
    645,485.90x = 332,679,217,329.21
  5. Step 5: Solve for x
    x = 332,679,217,329.21/645,485.90
  6. Step 6: Final answer
    x = 515,393.47

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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.