Home / 645,063.75-890,145.86-358,573.23

Finding the Fourth Proportional to 645,063.75, 890,145.86 and 358,573.23

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Solution

The fourth proportional to 645,063.75, 890,145.86 and 358,573.23 is: 494,807.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,063.75 : 890,145.86 = 358,573.23 : x
  2. Step 2: Convert to fraction form
    645,063.75/890,145.86 = 358,573.23/x
  3. Step 3: Cross multiply
    645,063.75x = 890,145.86 × 358,573.23
  4. Step 4: Simplify right side
    645,063.75x = 319,182,474,398.46
  5. Step 5: Solve for x
    x = 319,182,474,398.46/645,063.75
  6. Step 6: Final answer
    x = 494,807.64

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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.