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Finding the Fourth Proportional to 662,673.68, 914,368.20 and 390,826.64

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Solution

The fourth proportional to 662,673.68, 914,368.20 and 390,826.64 is: 539,269.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,673.68 : 914,368.20 = 390,826.64 : x
  2. Step 2: Convert to fraction form
    662,673.68/914,368.20 = 390,826.64/x
  3. Step 3: Cross multiply
    662,673.68x = 914,368.20 × 390,826.64
  4. Step 4: Simplify right side
    662,673.68x = 357,359,451,328.85
  5. Step 5: Solve for x
    x = 357,359,451,328.85/662,673.68
  6. Step 6: Final answer
    x = 539,269.12

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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.