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Finding the Fourth Proportional to 645,967.79, 891,429.05 and 359,483.03

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Solution

The fourth proportional to 645,967.79, 891,429.05 and 359,483.03 is: 496,082.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,967.79 : 891,429.05 = 359,483.03 : x
  2. Step 2: Convert to fraction form
    645,967.79/891,429.05 = 359,483.03/x
  3. Step 3: Cross multiply
    645,967.79x = 891,429.05 × 359,483.03
  4. Step 4: Simplify right side
    645,967.79x = 320,453,614,126.61
  5. Step 5: Solve for x
    x = 320,453,614,126.61/645,967.79
  6. Step 6: Final answer
    x = 496,082.96

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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.