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Finding the Fourth Proportional to 636,134.76, 877,872.78 and 345,746.34

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Solution

The fourth proportional to 636,134.76, 877,872.78 and 345,746.34 is: 477,133.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,134.76 : 877,872.78 = 345,746.34 : x
  2. Step 2: Convert to fraction form
    636,134.76/877,872.78 = 345,746.34/x
  3. Step 3: Cross multiply
    636,134.76x = 877,872.78 × 345,746.34
  4. Step 4: Simplify right side
    636,134.76x = 303,521,300,670.63
  5. Step 5: Solve for x
    x = 303,521,300,670.63/636,134.76
  6. Step 6: Final answer
    x = 477,133.65

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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.