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Finding the Fourth Proportional to 708,589,068.55, 989,728,870.85 and 708,589,068.55

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Solution

The fourth proportional to 708,589,068.55, 989,728,870.85 and 708,589,068.55 is: 989,728,870.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,589,068.55 : 989,728,870.85 = 708,589,068.55 : x
  2. Step 2: Convert to fraction form
    708,589,068.55/989,728,870.85 = 708,589,068.55/x
  3. Step 3: Cross multiply
    708,589,068.55x = 989,728,870.85 × 708,589,068.55
  4. Step 4: Simplify right side
    708,589,068.55x = 701,311,058,712,644,736
  5. Step 5: Solve for x
    x = 701,311,058,712,644,736/708,589,068.55
  6. Step 6: Final answer
    x = 989,728,870.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.