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Finding the Fourth Proportional to 638,328.72, 957,389.40 and 301,368.72

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Solution

The fourth proportional to 638,328.72, 957,389.40 and 301,368.72 is: 452,004.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,328.72 : 957,389.40 = 301,368.72 : x
  2. Step 2: Convert to fraction form
    638,328.72/957,389.40 = 301,368.72/x
  3. Step 3: Cross multiply
    638,328.72x = 957,389.40 × 301,368.72
  4. Step 4: Simplify right side
    638,328.72x = 288,527,218,019.57
  5. Step 5: Solve for x
    x = 288,527,218,019.57/638,328.72
  6. Step 6: Final answer
    x = 452,004.13

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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.