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Finding the Fourth Proportional to 1,281,418,859.72, 1,768,426,687.77 and 716,870,063.50

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Solution

The fourth proportional to 1,281,418,859.72, 1,768,426,687.77 and 716,870,063.50 is: 989,319,099.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,418,859.72 : 1,768,426,687.77 = 716,870,063.50 : x
  2. Step 2: Convert to fraction form
    1,281,418,859.72/1,768,426,687.77 = 716,870,063.50/x
  3. Step 3: Cross multiply
    1,281,418,859.72x = 1,768,426,687.77 × 716,870,063.50
  4. Step 4: Simplify right side
    1,281,418,859.72x = 1,267,732,151,956,774,656
  5. Step 5: Solve for x
    x = 1,267,732,151,956,774,656/1,281,418,859.72
  6. Step 6: Final answer
    x = 989,319,099.17

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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.