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Finding the Fourth Proportional to 549,138.88, 757,826.08 and 307,420.40

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Solution

The fourth proportional to 549,138.88, 757,826.08 and 307,420.40 is: 424,248.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,138.88 : 757,826.08 = 307,420.40 : x
  2. Step 2: Convert to fraction form
    549,138.88/757,826.08 = 307,420.40/x
  3. Step 3: Cross multiply
    549,138.88x = 757,826.08 × 307,420.40
  4. Step 4: Simplify right side
    549,138.88x = 232,971,196,644.03
  5. Step 5: Solve for x
    x = 232,971,196,644.03/549,138.88
  6. Step 6: Final answer
    x = 424,248.23

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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.