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Finding the Fourth Proportional to 751,806,908, 1,128,817,376.04 and 420,463,095.92

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Solution

The fourth proportional to 751,806,908, 1,128,817,376.04 and 420,463,095.92 is: 631,313,763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    751,806,908 : 1,128,817,376.04 = 420,463,095.92 : x
  2. Step 2: Convert to fraction form
    751,806,908/1,128,817,376.04 = 420,463,095.92/x
  3. Step 3: Cross multiply
    751,806,908x = 1,128,817,376.04 × 420,463,095.92
  4. Step 4: Simplify right side
    751,806,908x = 474,626,048,658,069,248
  5. Step 5: Solve for x
    x = 474,626,048,658,069,248/751,806,908
  6. Step 6: Final answer
    x = 631,313,763.69

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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.