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Finding the Fourth Proportional to 840,435.12, 1,260,483.12 and 307,774.32

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Solution

The fourth proportional to 840,435.12, 1,260,483.12 and 307,774.32 is: 461,599.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,435.12 : 1,260,483.12 = 307,774.32 : x
  2. Step 2: Convert to fraction form
    840,435.12/1,260,483.12 = 307,774.32/x
  3. Step 3: Cross multiply
    840,435.12x = 1,260,483.12 × 307,774.32
  4. Step 4: Simplify right side
    840,435.12x = 387,944,335,129.48
  5. Step 5: Solve for x
    x = 387,944,335,129.48/840,435.12
  6. Step 6: Final answer
    x = 461,599.39

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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.