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Finding the Fourth Proportional to 612,362.72, 845,074.62 and 340,420.16

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Solution

The fourth proportional to 612,362.72, 845,074.62 and 340,420.16 is: 469,787.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,362.72 : 845,074.62 = 340,420.16 : x
  2. Step 2: Convert to fraction form
    612,362.72/845,074.62 = 340,420.16/x
  3. Step 3: Cross multiply
    612,362.72x = 845,074.62 × 340,420.16
  4. Step 4: Simplify right side
    612,362.72x = 287,680,437,352.34
  5. Step 5: Solve for x
    x = 287,680,437,352.34/612,362.72
  6. Step 6: Final answer
    x = 469,787.64

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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.