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Finding the Fourth Proportional to 645,233.84, 890,325 and 369,548.88

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Solution

The fourth proportional to 645,233.84, 890,325 and 369,548.88 is: 509,921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,233.84 : 890,325 = 369,548.88 : x
  2. Step 2: Convert to fraction form
    645,233.84/890,325 = 369,548.88/x
  3. Step 3: Cross multiply
    645,233.84x = 890,325 × 369,548.88
  4. Step 4: Simplify right side
    645,233.84x = 329,018,606,586
  5. Step 5: Solve for x
    x = 329,018,606,586/645,233.84
  6. Step 6: Final answer
    x = 509,921.50

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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.