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Finding the Fourth Proportional to 944,356, 1,303,211.28 and 520,420

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Solution

The fourth proportional to 944,356, 1,303,211.28 and 520,420 is: 718,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    944,356 : 1,303,211.28 = 520,420 : x
  2. Step 2: Convert to fraction form
    944,356/1,303,211.28 = 520,420/x
  3. Step 3: Cross multiply
    944,356x = 1,303,211.28 × 520,420
  4. Step 4: Simplify right side
    944,356x = 678,217,214,337.60
  5. Step 5: Solve for x
    x = 678,217,214,337.60/944,356
  6. Step 6: Final answer
    x = 718,179.60

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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.