Home / 645,128.64-890,227.09-358,631.28

Finding the Fourth Proportional to 645,128.64, 890,227.09 and 358,631.28

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Solution

The fourth proportional to 645,128.64, 890,227.09 and 358,631.28 is: 494,883.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,128.64 : 890,227.09 = 358,631.28 : x
  2. Step 2: Convert to fraction form
    645,128.64/890,227.09 = 358,631.28/x
  3. Step 3: Cross multiply
    645,128.64x = 890,227.09 × 358,631.28
  4. Step 4: Simplify right side
    645,128.64x = 319,263,274,533.08
  5. Step 5: Solve for x
    x = 319,263,274,533.08/645,128.64
  6. Step 6: Final answer
    x = 494,883.12

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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.