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Finding the Fourth Proportional to 630,765.63, 870,423.57 and 344,280.78

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Solution

The fourth proportional to 630,765.63, 870,423.57 and 344,280.78 is: 475,089.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,765.63 : 870,423.57 = 344,280.78 : x
  2. Step 2: Convert to fraction form
    630,765.63/870,423.57 = 344,280.78/x
  3. Step 3: Cross multiply
    630,765.63x = 870,423.57 × 344,280.78
  4. Step 4: Simplify right side
    630,765.63x = 299,670,105,609.99
  5. Step 5: Solve for x
    x = 299,670,105,609.99/630,765.63
  6. Step 6: Final answer
    x = 475,089.46

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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.