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Finding the Fourth Proportional to 878,980.32, 1,213,016.64 and 497,064

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Solution

The fourth proportional to 878,980.32, 1,213,016.64 and 497,064 is: 685,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,980.32 : 1,213,016.64 = 497,064 : x
  2. Step 2: Convert to fraction form
    878,980.32/1,213,016.64 = 497,064/x
  3. Step 3: Cross multiply
    878,980.32x = 1,213,016.64 × 497,064
  4. Step 4: Simplify right side
    878,980.32x = 602,946,903,144.96
  5. Step 5: Solve for x
    x = 602,946,903,144.96/878,980.32
  6. Step 6: Final answer
    x = 685,961.78

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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.