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Finding the Fourth Proportional to 630,762.80, 870,732.60 and 427,109.36

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Solution

The fourth proportional to 630,762.80, 870,732.60 and 427,109.36 is: 589,600.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,762.80 : 870,732.60 = 427,109.36 : x
  2. Step 2: Convert to fraction form
    630,762.80/870,732.60 = 427,109.36/x
  3. Step 3: Cross multiply
    630,762.80x = 870,732.60 × 427,109.36
  4. Step 4: Simplify right side
    630,762.80x = 371,898,043,517.14
  5. Step 5: Solve for x
    x = 371,898,043,517.14/630,762.80
  6. Step 6: Final answer
    x = 589,600.47

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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.