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Finding the Fourth Proportional to 420,756.93, 580,648.50 and 239,460.10

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Solution

The fourth proportional to 420,756.93, 580,648.50 and 239,460.10 is: 330,457.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,756.93 : 580,648.50 = 239,460.10 : x
  2. Step 2: Convert to fraction form
    420,756.93/580,648.50 = 239,460.10/x
  3. Step 3: Cross multiply
    420,756.93x = 580,648.50 × 239,460.10
  4. Step 4: Simplify right side
    420,756.93x = 139,042,146,423.23
  5. Step 5: Solve for x
    x = 139,042,146,423.23/420,756.93
  6. Step 6: Final answer
    x = 330,457.17

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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.