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Finding the Fourth Proportional to 505,655.20, 697,810.32 and 279,325.60

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Solution

The fourth proportional to 505,655.20, 697,810.32 and 279,325.60 is: 385,472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,655.20 : 697,810.32 = 279,325.60 : x
  2. Step 2: Convert to fraction form
    505,655.20/697,810.32 = 279,325.60/x
  3. Step 3: Cross multiply
    505,655.20x = 697,810.32 × 279,325.60
  4. Step 4: Simplify right side
    505,655.20x = 194,916,286,320.19
  5. Step 5: Solve for x
    x = 194,916,286,320.19/505,655.20
  6. Step 6: Final answer
    x = 385,472.72

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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.