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Finding the Fourth Proportional to 423,978.80, 634,801.80 and 402,983.60

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Solution

The fourth proportional to 423,978.80, 634,801.80 and 402,983.60 is: 603,366.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,978.80 : 634,801.80 = 402,983.60 : x
  2. Step 2: Convert to fraction form
    423,978.80/634,801.80 = 402,983.60/x
  3. Step 3: Cross multiply
    423,978.80x = 634,801.80 × 402,983.60
  4. Step 4: Simplify right side
    423,978.80x = 255,814,714,650.48
  5. Step 5: Solve for x
    x = 255,814,714,650.48/423,978.80
  6. Step 6: Final answer
    x = 603,366.76

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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.