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Finding the Fourth Proportional to 485,608.74, 666,574.74 and 430,693.20

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Solution

The fourth proportional to 485,608.74, 666,574.74 and 430,693.20 is: 591,194.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,608.74 : 666,574.74 = 430,693.20 : x
  2. Step 2: Convert to fraction form
    485,608.74/666,574.74 = 430,693.20/x
  3. Step 3: Cross multiply
    485,608.74x = 666,574.74 × 430,693.20
  4. Step 4: Simplify right side
    485,608.74x = 287,089,207,809.77
  5. Step 5: Solve for x
    x = 287,089,207,809.77/485,608.74
  6. Step 6: Final answer
    x = 591,194.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.