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Finding the Fourth Proportional to 505,314.72, 697,316.04 and 278,955.36

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Solution

The fourth proportional to 505,314.72, 697,316.04 and 278,955.36 is: 384,948.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,314.72 : 697,316.04 = 278,955.36 : x
  2. Step 2: Convert to fraction form
    505,314.72/697,316.04 = 278,955.36/x
  3. Step 3: Cross multiply
    505,314.72x = 697,316.04 × 278,955.36
  4. Step 4: Simplify right side
    505,314.72x = 194,520,046,971.97
  5. Step 5: Solve for x
    x = 194,520,046,971.97/505,314.72
  6. Step 6: Final answer
    x = 384,948.31

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1.5x scale

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.