Home / 428,544,006.60-642,816,009.90-256,551,328.20

Finding the Fourth Proportional to 428,544,006.60, 642,816,009.90 and 256,551,328.20

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Solution

The fourth proportional to 428,544,006.60, 642,816,009.90 and 256,551,328.20 is: 384,826,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,544,006.60 : 642,816,009.90 = 256,551,328.20 : x
  2. Step 2: Convert to fraction form
    428,544,006.60/642,816,009.90 = 256,551,328.20/x
  3. Step 3: Cross multiply
    428,544,006.60x = 642,816,009.90 × 256,551,328.20
  4. Step 4: Simplify right side
    428,544,006.60x = 164,915,301,128,069,344
  5. Step 5: Solve for x
    x = 164,915,301,128,069,344/428,544,006.60
  6. Step 6: Final answer
    x = 384,826,992.30

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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.