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Finding the Fourth Proportional to 396,510.90, 545,802.18 and 342,235.29

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Solution

The fourth proportional to 396,510.90, 545,802.18 and 342,235.29 is: 471,091.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,510.90 : 545,802.18 = 342,235.29 : x
  2. Step 2: Convert to fraction form
    396,510.90/545,802.18 = 342,235.29/x
  3. Step 3: Cross multiply
    396,510.90x = 545,802.18 × 342,235.29
  4. Step 4: Simplify right side
    396,510.90x = 186,792,767,354.93
  5. Step 5: Solve for x
    x = 186,792,767,354.93/396,510.90
  6. Step 6: Final answer
    x = 471,091.13

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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.