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Finding the Fourth Proportional to 520,763.40, 718,643.88 and 294,408.72

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Solution

The fourth proportional to 520,763.40, 718,643.88 and 294,408.72 is: 406,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,763.40 : 718,643.88 = 294,408.72 : x
  2. Step 2: Convert to fraction form
    520,763.40/718,643.88 = 294,408.72/x
  3. Step 3: Cross multiply
    520,763.40x = 718,643.88 × 294,408.72
  4. Step 4: Simplify right side
    520,763.40x = 211,575,024,846.63
  5. Step 5: Solve for x
    x = 211,575,024,846.63/520,763.40
  6. Step 6: Final answer
    x = 406,278.60

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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.