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Finding the Fourth Proportional to 558,863,985.60, 838,295,978.40 and 195,320,433.60

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Solution

The fourth proportional to 558,863,985.60, 838,295,978.40 and 195,320,433.60 is: 292,980,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,863,985.60 : 838,295,978.40 = 195,320,433.60 : x
  2. Step 2: Convert to fraction form
    558,863,985.60/838,295,978.40 = 195,320,433.60/x
  3. Step 3: Cross multiply
    558,863,985.60x = 838,295,978.40 × 195,320,433.60
  4. Step 4: Simplify right side
    558,863,985.60x = 163,736,333,986,224,224
  5. Step 5: Solve for x
    x = 163,736,333,986,224,224/558,863,985.60
  6. Step 6: Final answer
    x = 292,980,650.40

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Similar ratio
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1.5x scale

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.