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Finding the Fourth Proportional to 553,313.81, 763,605.60 and 338,495.05

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Solution

The fourth proportional to 553,313.81, 763,605.60 and 338,495.05 is: 467,143.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,313.81 : 763,605.60 = 338,495.05 : x
  2. Step 2: Convert to fraction form
    553,313.81/763,605.60 = 338,495.05/x
  3. Step 3: Cross multiply
    553,313.81x = 763,605.60 × 338,495.05
  4. Step 4: Simplify right side
    553,313.81x = 258,476,715,752.28
  5. Step 5: Solve for x
    x = 258,476,715,752.28/553,313.81
  6. Step 6: Final answer
    x = 467,143.08

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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.