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Finding the Fourth Proportional to 553,064.68, 763,302 and 311,394.34

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Solution

The fourth proportional to 553,064.68, 763,302 and 311,394.34 is: 429,765.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,064.68 : 763,302 = 311,394.34 : x
  2. Step 2: Convert to fraction form
    553,064.68/763,302 = 311,394.34/x
  3. Step 3: Cross multiply
    553,064.68x = 763,302 × 311,394.34
  4. Step 4: Simplify right side
    553,064.68x = 237,687,922,510.68
  5. Step 5: Solve for x
    x = 237,687,922,510.68/553,064.68
  6. Step 6: Final answer
    x = 429,765.15

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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.