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Finding the Fourth Proportional to 663,285.72, 915,366.74 and 372,988.64

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Solution

The fourth proportional to 663,285.72, 915,366.74 and 372,988.64 is: 514,742.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,285.72 : 915,366.74 = 372,988.64 : x
  2. Step 2: Convert to fraction form
    663,285.72/915,366.74 = 372,988.64/x
  3. Step 3: Cross multiply
    663,285.72x = 915,366.74 × 372,988.64
  4. Step 4: Simplify right side
    663,285.72x = 341,421,395,453.83
  5. Step 5: Solve for x
    x = 341,421,395,453.83/663,285.72
  6. Step 6: Final answer
    x = 514,742.57

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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.