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Finding the Fourth Proportional to 613,497.10, 920,777.31 and 612,078.58

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Solution

The fourth proportional to 613,497.10, 920,777.31 and 612,078.58 is: 918,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,497.10 : 920,777.31 = 612,078.58 : x
  2. Step 2: Convert to fraction form
    613,497.10/920,777.31 = 612,078.58/x
  3. Step 3: Cross multiply
    613,497.10x = 920,777.31 × 612,078.58
  4. Step 4: Simplify right side
    613,497.10x = 563,588,068,401.02
  5. Step 5: Solve for x
    x = 563,588,068,401.02/613,497.10
  6. Step 6: Final answer
    x = 918,648.30

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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.