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Finding the Fourth Proportional to 631,999.70, 947,999.55 and 408,050.90

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Solution

The fourth proportional to 631,999.70, 947,999.55 and 408,050.90 is: 612,076.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,999.70 : 947,999.55 = 408,050.90 : x
  2. Step 2: Convert to fraction form
    631,999.70/947,999.55 = 408,050.90/x
  3. Step 3: Cross multiply
    631,999.70x = 947,999.55 × 408,050.90
  4. Step 4: Simplify right side
    631,999.70x = 386,832,069,577.10
  5. Step 5: Solve for x
    x = 386,832,069,577.10/631,999.70
  6. Step 6: Final answer
    x = 612,076.35

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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.