Home / 428,544,005.60-642,816,008.40-256,551,327.20

Finding the Fourth Proportional to 428,544,005.60, 642,816,008.40 and 256,551,327.20

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Solution

The fourth proportional to 428,544,005.60, 642,816,008.40 and 256,551,327.20 is: 384,826,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,544,005.60 : 642,816,008.40 = 256,551,327.20 : x
  2. Step 2: Convert to fraction form
    428,544,005.60/642,816,008.40 = 256,551,327.20/x
  3. Step 3: Cross multiply
    428,544,005.60x = 642,816,008.40 × 256,551,327.20
  4. Step 4: Simplify right side
    428,544,005.60x = 164,915,300,100,426,336
  5. Step 5: Solve for x
    x = 164,915,300,100,426,336/428,544,005.60
  6. Step 6: Final answer
    x = 384,826,990.80

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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.