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Finding the Fourth Proportional to 621,875.76, 931,318.81 and 354,826.66

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Solution

The fourth proportional to 621,875.76, 931,318.81 and 354,826.66 is: 531,387.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,875.76 : 931,318.81 = 354,826.66 : x
  2. Step 2: Convert to fraction form
    621,875.76/931,318.81 = 354,826.66/x
  3. Step 3: Cross multiply
    621,875.76x = 931,318.81 × 354,826.66
  4. Step 4: Simplify right side
    621,875.76x = 330,456,742,747.48
  5. Step 5: Solve for x
    x = 330,456,742,747.48/621,875.76
  6. Step 6: Final answer
    x = 531,387.08

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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.