Home / 420,143.28-630,495.18-217,925.76

Finding the Fourth Proportional to 420,143.28, 630,495.18 and 217,925.76

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Solution

The fourth proportional to 420,143.28, 630,495.18 and 217,925.76 is: 327,034.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,143.28 : 630,495.18 = 217,925.76 : x
  2. Step 2: Convert to fraction form
    420,143.28/630,495.18 = 217,925.76/x
  3. Step 3: Cross multiply
    420,143.28x = 630,495.18 × 217,925.76
  4. Step 4: Simplify right side
    420,143.28x = 137,401,141,277.84
  5. Step 5: Solve for x
    x = 137,401,141,277.84/420,143.28
  6. Step 6: Final answer
    x = 327,034.01

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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.