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Finding the Fourth Proportional to 630,847.78, 870,453.50 and 358,899.80

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Solution

The fourth proportional to 630,847.78, 870,453.50 and 358,899.80 is: 495,215.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,847.78 : 870,453.50 = 358,899.80 : x
  2. Step 2: Convert to fraction form
    630,847.78/870,453.50 = 358,899.80/x
  3. Step 3: Cross multiply
    630,847.78x = 870,453.50 × 358,899.80
  4. Step 4: Simplify right side
    630,847.78x = 312,405,587,059.30
  5. Step 5: Solve for x
    x = 312,405,587,059.30/630,847.78
  6. Step 6: Final answer
    x = 495,215.48

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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.