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Finding the Fourth Proportional to 630,729.72, 870,403.32 and 358,796.88

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Solution

The fourth proportional to 630,729.72, 870,403.32 and 358,796.88 is: 495,137.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,729.72 : 870,403.32 = 358,796.88 : x
  2. Step 2: Convert to fraction form
    630,729.72/870,403.32 = 358,796.88/x
  3. Step 3: Cross multiply
    630,729.72x = 870,403.32 × 358,796.88
  4. Step 4: Simplify right side
    630,729.72x = 312,297,995,557.64
  5. Step 5: Solve for x
    x = 312,297,995,557.64/630,729.72
  6. Step 6: Final answer
    x = 495,137.59

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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.