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Finding the Fourth Proportional to 615,086.10, 920,879.55 and 545,102.10

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Solution

The fourth proportional to 615,086.10, 920,879.55 and 545,102.10 is: 816,102.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,086.10 : 920,879.55 = 545,102.10 : x
  2. Step 2: Convert to fraction form
    615,086.10/920,879.55 = 545,102.10/x
  3. Step 3: Cross multiply
    615,086.10x = 920,879.55 × 545,102.10
  4. Step 4: Simplify right side
    615,086.10x = 501,973,376,552.06
  5. Step 5: Solve for x
    x = 501,973,376,552.06/615,086.10
  6. Step 6: Final answer
    x = 816,102.62

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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.