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Finding the Fourth Proportional to 505,753.60, 697,934.72 and 279,384.32

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Solution

The fourth proportional to 505,753.60, 697,934.72 and 279,384.32 is: 385,547.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,753.60 : 697,934.72 = 279,384.32 : x
  2. Step 2: Convert to fraction form
    505,753.60/697,934.72 = 279,384.32/x
  3. Step 3: Cross multiply
    505,753.60x = 697,934.72 × 279,384.32
  4. Step 4: Simplify right side
    505,753.60x = 194,992,017,151.59
  5. Step 5: Solve for x
    x = 194,992,017,151.59/505,753.60
  6. Step 6: Final answer
    x = 385,547.46

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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.