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Finding the Fourth Proportional to 615,658.60, 921,738.30 and 545,674.60

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Solution

The fourth proportional to 615,658.60, 921,738.30 and 545,674.60 is: 816,961.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,658.60 : 921,738.30 = 545,674.60 : x
  2. Step 2: Convert to fraction form
    615,658.60/921,738.30 = 545,674.60/x
  3. Step 3: Cross multiply
    615,658.60x = 921,738.30 × 545,674.60
  4. Step 4: Simplify right side
    615,658.60x = 502,969,178,157.18
  5. Step 5: Solve for x
    x = 502,969,178,157.18/615,658.60
  6. Step 6: Final answer
    x = 816,961.18

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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.