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Finding the Fourth Proportional to 556,787.18, 768,355.62 and 315,065.36

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Solution

The fourth proportional to 556,787.18, 768,355.62 and 315,065.36 is: 434,784.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,787.18 : 768,355.62 = 315,065.36 : x
  2. Step 2: Convert to fraction form
    556,787.18/768,355.62 = 315,065.36/x
  3. Step 3: Cross multiply
    556,787.18x = 768,355.62 × 315,065.36
  4. Step 4: Simplify right side
    556,787.18x = 242,082,240,023.32
  5. Step 5: Solve for x
    x = 242,082,240,023.32/556,787.18
  6. Step 6: Final answer
    x = 434,784.15

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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.