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Finding the Fourth Proportional to 715,391,999.40, 1,073,087,999.10 and 715,391,999.40

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Solution

The fourth proportional to 715,391,999.40, 1,073,087,999.10 and 715,391,999.40 is: 1,073,087,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,391,999.40 : 1,073,087,999.10 = 715,391,999.40 : x
  2. Step 2: Convert to fraction form
    715,391,999.40/1,073,087,999.10 = 715,391,999.40/x
  3. Step 3: Cross multiply
    715,391,999.40x = 1,073,087,999.10 × 715,391,999.40
  4. Step 4: Simplify right side
    715,391,999.40x = 767,678,569,208,294,400
  5. Step 5: Solve for x
    x = 767,678,569,208,294,400/715,391,999.40
  6. Step 6: Final answer
    x = 1,073,087,999.10

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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.