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Finding the Fourth Proportional to 630,636.12, 870,297.08 and 358,743.42

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Solution

The fourth proportional to 630,636.12, 870,297.08 and 358,743.42 is: 495,076.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,636.12 : 870,297.08 = 358,743.42 : x
  2. Step 2: Convert to fraction form
    630,636.12/870,297.08 = 358,743.42/x
  3. Step 3: Cross multiply
    630,636.12x = 870,297.08 × 358,743.42
  4. Step 4: Simplify right side
    630,636.12x = 312,213,349,101.50
  5. Step 5: Solve for x
    x = 312,213,349,101.50/630,636.12
  6. Step 6: Final answer
    x = 495,076.86

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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.