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Finding the Fourth Proportional to 660,140.72, 988,505.71 and 455,606.50

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Solution

The fourth proportional to 660,140.72, 988,505.71 and 455,606.50 is: 682,232.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,140.72 : 988,505.71 = 455,606.50 : x
  2. Step 2: Convert to fraction form
    660,140.72/988,505.71 = 455,606.50/x
  3. Step 3: Cross multiply
    660,140.72x = 988,505.71 × 455,606.50
  4. Step 4: Simplify right side
    660,140.72x = 450,369,630,421.70
  5. Step 5: Solve for x
    x = 450,369,630,421.70/660,140.72
  6. Step 6: Final answer
    x = 682,232.77

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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.