Home / 630,523.63-869,895.27-485,373.80

Finding the Fourth Proportional to 630,523.63, 869,895.27 and 485,373.80

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Solution

The fourth proportional to 630,523.63, 869,895.27 and 485,373.80 is: 669,640.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,523.63 : 869,895.27 = 485,373.80 : x
  2. Step 2: Convert to fraction form
    630,523.63/869,895.27 = 485,373.80/x
  3. Step 3: Cross multiply
    630,523.63x = 869,895.27 × 485,373.80
  4. Step 4: Simplify right side
    630,523.63x = 422,224,374,976.66
  5. Step 5: Solve for x
    x = 422,224,374,976.66/630,523.63
  6. Step 6: Final answer
    x = 669,640.84

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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.