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Finding the Fourth Proportional to 659,886,000.40, 990,466,729.80 and 401,605,674.40

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Solution

The fourth proportional to 659,886,000.40, 990,466,729.80 and 401,605,674.40 is: 602,796,632.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,886,000.40 : 990,466,729.80 = 401,605,674.40 : x
  2. Step 2: Convert to fraction form
    659,886,000.40/990,466,729.80 = 401,605,674.40/x
  3. Step 3: Cross multiply
    659,886,000.40x = 990,466,729.80 × 401,605,674.40
  4. Step 4: Simplify right side
    659,886,000.40x = 397,777,058,992,091,520
  5. Step 5: Solve for x
    x = 397,777,058,992,091,520/659,886,000.40
  6. Step 6: Final answer
    x = 602,796,632.68

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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.