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Finding the Fourth Proportional to 553,533.96, 763,950.24 and 311,864.40

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Solution

The fourth proportional to 553,533.96, 763,950.24 and 311,864.40 is: 430,414.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,533.96 : 763,950.24 = 311,864.40 : x
  2. Step 2: Convert to fraction form
    553,533.96/763,950.24 = 311,864.40/x
  3. Step 3: Cross multiply
    553,533.96x = 763,950.24 × 311,864.40
  4. Step 4: Simplify right side
    553,533.96x = 238,248,883,227.46
  5. Step 5: Solve for x
    x = 238,248,883,227.46/553,533.96
  6. Step 6: Final answer
    x = 430,414.21

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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.