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Finding the Fourth Proportional to 630,339.66, 869,871.30 and 343,865.76

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Solution

The fourth proportional to 630,339.66, 869,871.30 and 343,865.76 is: 474,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,339.66 : 869,871.30 = 343,865.76 : x
  2. Step 2: Convert to fraction form
    630,339.66/869,871.30 = 343,865.76/x
  3. Step 3: Cross multiply
    630,339.66x = 869,871.30 × 343,865.76
  4. Step 4: Simplify right side
    630,339.66x = 299,118,955,676.69
  5. Step 5: Solve for x
    x = 299,118,955,676.69/630,339.66
  6. Step 6: Final answer
    x = 474,536.15

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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.