Home / 645,321.89-890,544.95-358,835.83

Finding the Fourth Proportional to 645,321.89, 890,544.95 and 358,835.83

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Solution

The fourth proportional to 645,321.89, 890,544.95 and 358,835.83 is: 495,193.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,321.89 : 890,544.95 = 358,835.83 : x
  2. Step 2: Convert to fraction form
    645,321.89/890,544.95 = 358,835.83/x
  3. Step 3: Cross multiply
    645,321.89x = 890,544.95 × 358,835.83
  4. Step 4: Simplify right side
    645,321.89x = 319,559,434,956.29
  5. Step 5: Solve for x
    x = 319,559,434,956.29/645,321.89
  6. Step 6: Final answer
    x = 495,193.85

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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.