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Finding the Fourth Proportional to 388,465,405.60, 582,698,108.40 and 356,720,663.20

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Solution

The fourth proportional to 388,465,405.60, 582,698,108.40 and 356,720,663.20 is: 535,080,994.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,465,405.60 : 582,698,108.40 = 356,720,663.20 : x
  2. Step 2: Convert to fraction form
    388,465,405.60/582,698,108.40 = 356,720,663.20/x
  3. Step 3: Cross multiply
    388,465,405.60x = 582,698,108.40 × 356,720,663.20
  4. Step 4: Simplify right side
    388,465,405.60x = 207,860,455,673,833,472
  5. Step 5: Solve for x
    x = 207,860,455,673,833,472/388,465,405.60
  6. Step 6: Final answer
    x = 535,080,994.80

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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.