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Finding the Fourth Proportional to 615,063.60, 920,845.80 and 545,079.60

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Solution

The fourth proportional to 615,063.60, 920,845.80 and 545,079.60 is: 816,068.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,063.60 : 920,845.80 = 545,079.60 : x
  2. Step 2: Convert to fraction form
    615,063.60/920,845.80 = 545,079.60/x
  3. Step 3: Cross multiply
    615,063.60x = 920,845.80 × 545,079.60
  4. Step 4: Simplify right side
    615,063.60x = 501,934,260,325.68
  5. Step 5: Solve for x
    x = 501,934,260,325.68/615,063.60
  6. Step 6: Final answer
    x = 816,068.88

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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.