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Finding the Fourth Proportional to 642,275.29, 884,317.73 and 545,287.31

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Solution

The fourth proportional to 642,275.29, 884,317.73 and 545,287.31 is: 750,779.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,275.29 : 884,317.73 = 545,287.31 : x
  2. Step 2: Convert to fraction form
    642,275.29/884,317.73 = 545,287.31/x
  3. Step 3: Cross multiply
    642,275.29x = 884,317.73 × 545,287.31
  4. Step 4: Simplify right side
    642,275.29x = 482,207,229,028.98
  5. Step 5: Solve for x
    x = 482,207,229,028.98/642,275.29
  6. Step 6: Final answer
    x = 750,779.67

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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.