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Finding the Fourth Proportional to 661,549,187.94, 912,909,912.28 and 360,128,232.51

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Solution

The fourth proportional to 661,549,187.94, 912,909,912.28 and 360,128,232.51 is: 496,961,736.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,549,187.94 : 912,909,912.28 = 360,128,232.51 : x
  2. Step 2: Convert to fraction form
    661,549,187.94/912,909,912.28 = 360,128,232.51/x
  3. Step 3: Cross multiply
    661,549,187.94x = 912,909,912.28 × 360,128,232.51
  4. Step 4: Simplify right side
    661,549,187.94x = 328,764,633,150,255,552
  5. Step 5: Solve for x
    x = 328,764,633,150,255,552/661,549,187.94
  6. Step 6: Final answer
    x = 496,961,736.40

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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.