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Finding the Fourth Proportional to 630,976.72, 870,084.96 and 415,841.60

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Solution

The fourth proportional to 630,976.72, 870,084.96 and 415,841.60 is: 573,424.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,976.72 : 870,084.96 = 415,841.60 : x
  2. Step 2: Convert to fraction form
    630,976.72/870,084.96 = 415,841.60/x
  3. Step 3: Cross multiply
    630,976.72x = 870,084.96 × 415,841.60
  4. Step 4: Simplify right side
    630,976.72x = 361,817,521,902.34
  5. Step 5: Solve for x
    x = 361,817,521,902.34/630,976.72
  6. Step 6: Final answer
    x = 573,424.52

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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.