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Finding the Fourth Proportional to 4,721,978.92, 7,082,176.04 and 1,310,612.11

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Solution

The fourth proportional to 4,721,978.92, 7,082,176.04 and 1,310,612.11 is: 1,965,698.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721,978.92 : 7,082,176.04 = 1,310,612.11 : x
  2. Step 2: Convert to fraction form
    4,721,978.92/7,082,176.04 = 1,310,612.11/x
  3. Step 3: Cross multiply
    4,721,978.92x = 7,082,176.04 × 1,310,612.11
  4. Step 4: Simplify right side
    4,721,978.92x = 9,281,985,703,669.38
  5. Step 5: Solve for x
    x = 9,281,985,703,669.38/4,721,978.92
  6. Step 6: Final answer
    x = 1,965,698.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.