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Finding the Fourth Proportional to 551,652.12, 761,356.67 and 309,953.39

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Solution

The fourth proportional to 551,652.12, 761,356.67 and 309,953.39 is: 427,778.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,652.12 : 761,356.67 = 309,953.39 : x
  2. Step 2: Convert to fraction form
    551,652.12/761,356.67 = 309,953.39/x
  3. Step 3: Cross multiply
    551,652.12x = 761,356.67 × 309,953.39
  4. Step 4: Simplify right side
    551,652.12x = 235,985,075,509.06
  5. Step 5: Solve for x
    x = 235,985,075,509.06/551,652.12
  6. Step 6: Final answer
    x = 427,778.79

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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.