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Finding the Fourth Proportional to 505,359, 697,395.42 and 279,004.50

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Solution

The fourth proportional to 505,359, 697,395.42 and 279,004.50 is: 385,026.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,359 : 697,395.42 = 279,004.50 : x
  2. Step 2: Convert to fraction form
    505,359/697,395.42 = 279,004.50/x
  3. Step 3: Cross multiply
    505,359x = 697,395.42 × 279,004.50
  4. Step 4: Simplify right side
    505,359x = 194,576,460,459.39
  5. Step 5: Solve for x
    x = 194,576,460,459.39/505,359
  6. Step 6: Final answer
    x = 385,026.21

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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.