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Finding the Fourth Proportional to 310,917.81, 466,376.73 and 86,278.30

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Solution

The fourth proportional to 310,917.81, 466,376.73 and 86,278.30 is: 129,417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,917.81 : 466,376.73 = 86,278.30 : x
  2. Step 2: Convert to fraction form
    310,917.81/466,376.73 = 86,278.30/x
  3. Step 3: Cross multiply
    310,917.81x = 466,376.73 × 86,278.30
  4. Step 4: Simplify right side
    310,917.81x = 40,238,191,423.96
  5. Step 5: Solve for x
    x = 40,238,191,423.96/310,917.81
  6. Step 6: Final answer
    x = 129,417.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.