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Finding the Fourth Proportional to 638,004.70, 957,007.05 and 578,955.70

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Solution

The fourth proportional to 638,004.70, 957,007.05 and 578,955.70 is: 868,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,004.70 : 957,007.05 = 578,955.70 : x
  2. Step 2: Convert to fraction form
    638,004.70/957,007.05 = 578,955.70/x
  3. Step 3: Cross multiply
    638,004.70x = 957,007.05 × 578,955.70
  4. Step 4: Simplify right side
    638,004.70x = 554,064,686,537.69
  5. Step 5: Solve for x
    x = 554,064,686,537.69/638,004.70
  6. Step 6: Final answer
    x = 868,433.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.