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Finding the Fourth Proportional to 393,368,333.60, 549,640,712.80 and 393,368,333.60

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Solution

The fourth proportional to 393,368,333.60, 549,640,712.80 and 393,368,333.60 is: 549,640,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,368,333.60 : 549,640,712.80 = 393,368,333.60 : x
  2. Step 2: Convert to fraction form
    393,368,333.60/549,640,712.80 = 393,368,333.60/x
  3. Step 3: Cross multiply
    393,368,333.60x = 549,640,712.80 × 393,368,333.60
  4. Step 4: Simplify right side
    393,368,333.60x = 216,211,251,272,852,192
  5. Step 5: Solve for x
    x = 216,211,251,272,852,192/393,368,333.60
  6. Step 6: Final answer
    x = 549,640,712.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.