Home / 645,321.95-890,507.73-358,835.89

Finding the Fourth Proportional to 645,321.95, 890,507.73 and 358,835.89

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Solution

The fourth proportional to 645,321.95, 890,507.73 and 358,835.89 is: 495,173.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,321.95 : 890,507.73 = 358,835.89 : x
  2. Step 2: Convert to fraction form
    645,321.95/890,507.73 = 358,835.89/x
  3. Step 3: Cross multiply
    645,321.95x = 890,507.73 × 358,835.89
  4. Step 4: Simplify right side
    645,321.95x = 319,546,133,846.43
  5. Step 5: Solve for x
    x = 319,546,133,846.43/645,321.95
  6. Step 6: Final answer
    x = 495,173.20

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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.