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Finding the Fourth Proportional to 661,123.72, 912,406.07 and 370,730.67

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Solution

The fourth proportional to 661,123.72, 912,406.07 and 370,730.67 is: 511,639.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,123.72 : 912,406.07 = 370,730.67 : x
  2. Step 2: Convert to fraction form
    661,123.72/912,406.07 = 370,730.67/x
  3. Step 3: Cross multiply
    661,123.72x = 912,406.07 × 370,730.67
  4. Step 4: Simplify right side
    661,123.72x = 338,256,916,280.76
  5. Step 5: Solve for x
    x = 338,256,916,280.76/661,123.72
  6. Step 6: Final answer
    x = 511,639.36

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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.