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Finding the Fourth Proportional to 492,095.34, 679,000.59 and 288,135.72

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Solution

The fourth proportional to 492,095.34, 679,000.59 and 288,135.72 is: 397,574.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,095.34 : 679,000.59 = 288,135.72 : x
  2. Step 2: Convert to fraction form
    492,095.34/679,000.59 = 288,135.72/x
  3. Step 3: Cross multiply
    492,095.34x = 679,000.59 × 288,135.72
  4. Step 4: Simplify right side
    492,095.34x = 195,644,323,880.08
  5. Step 5: Solve for x
    x = 195,644,323,880.08/492,095.34
  6. Step 6: Final answer
    x = 397,574.02

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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.