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Finding the Fourth Proportional to 719,248,508.28, 992,562,908.94 and 389,223,656.28

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Solution

The fourth proportional to 719,248,508.28, 992,562,908.94 and 389,223,656.28 is: 537,128,628.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,248,508.28 : 992,562,908.94 = 389,223,656.28 : x
  2. Step 2: Convert to fraction form
    719,248,508.28/992,562,908.94 = 389,223,656.28/x
  3. Step 3: Cross multiply
    719,248,508.28x = 992,562,908.94 × 389,223,656.28
  4. Step 4: Simplify right side
    719,248,508.28x = 386,328,964,505,539,520
  5. Step 5: Solve for x
    x = 386,328,964,505,539,520/719,248,508.28
  6. Step 6: Final answer
    x = 537,128,628.09

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1.5x scale

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.