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Finding the Fourth Proportional to 647,128.38, 893,040.16 and 375,357.18

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Solution

The fourth proportional to 647,128.38, 893,040.16 and 375,357.18 is: 517,994.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,128.38 : 893,040.16 = 375,357.18 : x
  2. Step 2: Convert to fraction form
    647,128.38/893,040.16 = 375,357.18/x
  3. Step 3: Cross multiply
    647,128.38x = 893,040.16 × 375,357.18
  4. Step 4: Simplify right side
    647,128.38x = 335,209,035,145.96
  5. Step 5: Solve for x
    x = 335,209,035,145.96/647,128.38
  6. Step 6: Final answer
    x = 517,994.64

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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.