Home / 644,741.10-889,501.10-399,613.77

Finding the Fourth Proportional to 644,741.10, 889,501.10 and 399,613.77

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Solution

The fourth proportional to 644,741.10, 889,501.10 and 399,613.77 is: 551,317.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,741.10 : 889,501.10 = 399,613.77 : x
  2. Step 2: Convert to fraction form
    644,741.10/889,501.10 = 399,613.77/x
  3. Step 3: Cross multiply
    644,741.10x = 889,501.10 × 399,613.77
  4. Step 4: Simplify right side
    644,741.10x = 355,456,885,992.08
  5. Step 5: Solve for x
    x = 355,456,885,992.08/644,741.10
  6. Step 6: Final answer
    x = 551,317.24

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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.