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Finding the Fourth Proportional to 553,064.67, 763,302 and 311,394.36

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Solution

The fourth proportional to 553,064.67, 763,302 and 311,394.36 is: 429,765.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,064.67 : 763,302 = 311,394.36 : x
  2. Step 2: Convert to fraction form
    553,064.67/763,302 = 311,394.36/x
  3. Step 3: Cross multiply
    553,064.67x = 763,302 × 311,394.36
  4. Step 4: Simplify right side
    553,064.67x = 237,687,937,776.72
  5. Step 5: Solve for x
    x = 237,687,937,776.72/553,064.67
  6. Step 6: Final answer
    x = 429,765.18

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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.