Home / 420,528.70-630,550.66-287,570.04

Finding the Fourth Proportional to 420,528.70, 630,550.66 and 287,570.04

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Solution

The fourth proportional to 420,528.70, 630,550.66 and 287,570.04 is: 431,189.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,528.70 : 630,550.66 = 287,570.04 : x
  2. Step 2: Convert to fraction form
    420,528.70/630,550.66 = 287,570.04/x
  3. Step 3: Cross multiply
    420,528.70x = 630,550.66 × 287,570.04
  4. Step 4: Simplify right side
    420,528.70x = 181,327,478,518.23
  5. Step 5: Solve for x
    x = 181,327,478,518.23/420,528.70
  6. Step 6: Final answer
    x = 431,189.31

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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.