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Finding the Fourth Proportional to 458,357.13, 686,741.90 and 248,139.45

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Solution

The fourth proportional to 458,357.13, 686,741.90 and 248,139.45 is: 371,779.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,357.13 : 686,741.90 = 248,139.45 : x
  2. Step 2: Convert to fraction form
    458,357.13/686,741.90 = 248,139.45/x
  3. Step 3: Cross multiply
    458,357.13x = 686,741.90 × 248,139.45
  4. Step 4: Simplify right side
    458,357.13x = 170,407,756,117.26
  5. Step 5: Solve for x
    x = 170,407,756,117.26/458,357.13
  6. Step 6: Final answer
    x = 371,779.44

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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.