Home / 645,112.51-890,285.64-358,637.38

Finding the Fourth Proportional to 645,112.51, 890,285.64 and 358,637.38

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Solution

The fourth proportional to 645,112.51, 890,285.64 and 358,637.38 is: 494,936.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,112.51 : 890,285.64 = 358,637.38 : x
  2. Step 2: Convert to fraction form
    645,112.51/890,285.64 = 358,637.38/x
  3. Step 3: Cross multiply
    645,112.51x = 890,285.64 × 358,637.38
  4. Step 4: Simplify right side
    645,112.51x = 319,289,709,381.22
  5. Step 5: Solve for x
    x = 319,289,709,381.22/645,112.51
  6. Step 6: Final answer
    x = 494,936.47

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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.