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Finding the Fourth Proportional to 553,600.48, 763,984.56 and 311,885.68

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Solution

The fourth proportional to 553,600.48, 763,984.56 and 311,885.68 is: 430,411.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,600.48 : 763,984.56 = 311,885.68 : x
  2. Step 2: Convert to fraction form
    553,600.48/763,984.56 = 311,885.68/x
  3. Step 3: Cross multiply
    553,600.48x = 763,984.56 × 311,885.68
  4. Step 4: Simplify right side
    553,600.48x = 238,275,844,005.10
  5. Step 5: Solve for x
    x = 238,275,844,005.10/553,600.48
  6. Step 6: Final answer
    x = 430,411.19

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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.