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Finding the Fourth Proportional to 528,042.72, 728,825.04 and 313,307.40

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Solution

The fourth proportional to 528,042.72, 728,825.04 and 313,307.40 is: 432,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,042.72 : 728,825.04 = 313,307.40 : x
  2. Step 2: Convert to fraction form
    528,042.72/728,825.04 = 313,307.40/x
  3. Step 3: Cross multiply
    528,042.72x = 728,825.04 × 313,307.40
  4. Step 4: Simplify right side
    528,042.72x = 228,346,278,337.30
  5. Step 5: Solve for x
    x = 228,346,278,337.30/528,042.72
  6. Step 6: Final answer
    x = 432,439.02

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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.