Home / 420,218.56-630,243.06-153,888.16

Finding the Fourth Proportional to 420,218.56, 630,243.06 and 153,888.16

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Solution

The fourth proportional to 420,218.56, 630,243.06 and 153,888.16 is: 230,801.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,218.56 : 630,243.06 = 153,888.16 : x
  2. Step 2: Convert to fraction form
    420,218.56/630,243.06 = 153,888.16/x
  3. Step 3: Cross multiply
    420,218.56x = 630,243.06 × 153,888.16
  4. Step 4: Simplify right side
    420,218.56x = 96,986,944,856.17
  5. Step 5: Solve for x
    x = 96,986,944,856.17/420,218.56
  6. Step 6: Final answer
    x = 230,801.19

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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.