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Finding the Fourth Proportional to 630,606.72, 870,265.62 and 355,059.45

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Solution

The fourth proportional to 630,606.72, 870,265.62 and 355,059.45 is: 489,998.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,606.72 : 870,265.62 = 355,059.45 : x
  2. Step 2: Convert to fraction form
    630,606.72/870,265.62 = 355,059.45/x
  3. Step 3: Cross multiply
    630,606.72x = 870,265.62 × 355,059.45
  4. Step 4: Simplify right side
    630,606.72x = 308,996,032,391.11
  5. Step 5: Solve for x
    x = 308,996,032,391.11/630,606.72
  6. Step 6: Final answer
    x = 489,998.00

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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.