Home / 851,751.40-1,278,663.90-430,810.60

Finding the Fourth Proportional to 851,751.40, 1,278,663.90 and 430,810.60

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Solution

The fourth proportional to 851,751.40, 1,278,663.90 and 430,810.60 is: 646,740.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,751.40 : 1,278,663.90 = 430,810.60 : x
  2. Step 2: Convert to fraction form
    851,751.40/1,278,663.90 = 430,810.60/x
  3. Step 3: Cross multiply
    851,751.40x = 1,278,663.90 × 430,810.60
  4. Step 4: Simplify right side
    851,751.40x = 550,861,961,957.34
  5. Step 5: Solve for x
    x = 550,861,961,957.34/851,751.40
  6. Step 6: Final answer
    x = 646,740.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.