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Finding the Fourth Proportional to 663,245.46, 915,018.93 and 408,153.78

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Solution

The fourth proportional to 663,245.46, 915,018.93 and 408,153.78 is: 563,092.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,245.46 : 915,018.93 = 408,153.78 : x
  2. Step 2: Convert to fraction form
    663,245.46/915,018.93 = 408,153.78/x
  3. Step 3: Cross multiply
    663,245.46x = 915,018.93 × 408,153.78
  4. Step 4: Simplify right side
    663,245.46x = 373,468,435,051.06
  5. Step 5: Solve for x
    x = 373,468,435,051.06/663,245.46
  6. Step 6: Final answer
    x = 563,092.34

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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.