Home / 420,480.07-630,803.18-154,242.89

Finding the Fourth Proportional to 420,480.07, 630,803.18 and 154,242.89

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Solution

The fourth proportional to 420,480.07, 630,803.18 and 154,242.89 is: 231,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,480.07 : 630,803.18 = 154,242.89 : x
  2. Step 2: Convert to fraction form
    420,480.07/630,803.18 = 154,242.89/x
  3. Step 3: Cross multiply
    420,480.07x = 630,803.18 × 154,242.89
  4. Step 4: Simplify right side
    420,480.07x = 97,296,901,579.16
  5. Step 5: Solve for x
    x = 97,296,901,579.16/420,480.07
  6. Step 6: Final answer
    x = 231,394.80

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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.