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Finding the Fourth Proportional to 660,082.47, 910,882.31 and 405,384.45

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Solution

The fourth proportional to 660,082.47, 910,882.31 and 405,384.45 is: 559,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,082.47 : 910,882.31 = 405,384.45 : x
  2. Step 2: Convert to fraction form
    660,082.47/910,882.31 = 405,384.45/x
  3. Step 3: Cross multiply
    660,082.47x = 910,882.31 × 405,384.45
  4. Step 4: Simplify right side
    660,082.47x = 369,257,521,091.64
  5. Step 5: Solve for x
    x = 369,257,521,091.64/660,082.47
  6. Step 6: Final answer
    x = 559,411.19

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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.