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Finding the Fourth Proportional to 554,588.81, 765,330.34 and 312,871.40

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Solution

The fourth proportional to 554,588.81, 765,330.34 and 312,871.40 is: 431,761.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,588.81 : 765,330.34 = 312,871.40 : x
  2. Step 2: Convert to fraction form
    554,588.81/765,330.34 = 312,871.40/x
  3. Step 3: Cross multiply
    554,588.81x = 765,330.34 × 312,871.40
  4. Step 4: Simplify right side
    554,588.81x = 239,449,974,938.28
  5. Step 5: Solve for x
    x = 239,449,974,938.28/554,588.81
  6. Step 6: Final answer
    x = 431,761.28

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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.