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Finding the Fourth Proportional to 551,907.34, 761,695.28 and 306,916.54

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Solution

The fourth proportional to 551,907.34, 761,695.28 and 306,916.54 is: 423,579.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,907.34 : 761,695.28 = 306,916.54 : x
  2. Step 2: Convert to fraction form
    551,907.34/761,695.28 = 306,916.54/x
  3. Step 3: Cross multiply
    551,907.34x = 761,695.28 × 306,916.54
  4. Step 4: Simplify right side
    551,907.34x = 233,776,879,871.93
  5. Step 5: Solve for x
    x = 233,776,879,871.93/551,907.34
  6. Step 6: Final answer
    x = 423,579.94

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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.