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Finding the Fourth Proportional to 551,528.70, 761,068.10 and 309,764.05

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Solution

The fourth proportional to 551,528.70, 761,068.10 and 309,764.05 is: 427,451.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,528.70 : 761,068.10 = 309,764.05 : x
  2. Step 2: Convert to fraction form
    551,528.70/761,068.10 = 309,764.05/x
  3. Step 3: Cross multiply
    551,528.70x = 761,068.10 × 309,764.05
  4. Step 4: Simplify right side
    551,528.70x = 235,751,535,853.55
  5. Step 5: Solve for x
    x = 235,751,535,853.55/551,528.70
  6. Step 6: Final answer
    x = 427,451.08

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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.