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Finding the Fourth Proportional to 706,492,655.52, 974,942,045.20 and 388,949,731.28

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Solution

The fourth proportional to 706,492,655.52, 974,942,045.20 and 388,949,731.28 is: 536,740,818.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,492,655.52 : 974,942,045.20 = 388,949,731.28 : x
  2. Step 2: Convert to fraction form
    706,492,655.52/974,942,045.20 = 388,949,731.28/x
  3. Step 3: Cross multiply
    706,492,655.52x = 974,942,045.20 × 388,949,731.28
  4. Step 4: Simplify right side
    706,492,655.52x = 379,203,446,494,113,600
  5. Step 5: Solve for x
    x = 379,203,446,494,113,600/706,492,655.52
  6. Step 6: Final answer
    x = 536,740,818.93

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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.