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Finding the Fourth Proportional to 879,713.64, 1,213,989.66 and 535,424.76

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Solution

The fourth proportional to 879,713.64, 1,213,989.66 and 535,424.76 is: 738,876.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,713.64 : 1,213,989.66 = 535,424.76 : x
  2. Step 2: Convert to fraction form
    879,713.64/1,213,989.66 = 535,424.76/x
  3. Step 3: Cross multiply
    879,713.64x = 1,213,989.66 × 535,424.76
  4. Step 4: Simplify right side
    879,713.64x = 650,000,122,347.98
  5. Step 5: Solve for x
    x = 650,000,122,347.98/879,713.64
  6. Step 6: Final answer
    x = 738,876.94

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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.