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Finding the Fourth Proportional to 631,921.60, 872,051.88 and 345,442.96

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Solution

The fourth proportional to 631,921.60, 872,051.88 and 345,442.96 is: 476,711.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,921.60 : 872,051.88 = 345,442.96 : x
  2. Step 2: Convert to fraction form
    631,921.60/872,051.88 = 345,442.96/x
  3. Step 3: Cross multiply
    631,921.60x = 872,051.88 × 345,442.96
  4. Step 4: Simplify right side
    631,921.60x = 301,244,182,700.77
  5. Step 5: Solve for x
    x = 301,244,182,700.77/631,921.60
  6. Step 6: Final answer
    x = 476,711.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.