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Finding the Fourth Proportional to 645,890.50, 891,328.89 and 363,266.50

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Solution

The fourth proportional to 645,890.50, 891,328.89 and 363,266.50 is: 501,307.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,890.50 : 891,328.89 = 363,266.50 : x
  2. Step 2: Convert to fraction form
    645,890.50/891,328.89 = 363,266.50/x
  3. Step 3: Cross multiply
    645,890.50x = 891,328.89 × 363,266.50
  4. Step 4: Simplify right side
    645,890.50x = 323,789,926,219.19
  5. Step 5: Solve for x
    x = 323,789,926,219.19/645,890.50
  6. Step 6: Final answer
    x = 501,307.77

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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.