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Finding the Fourth Proportional to 245,510.32, 338,765.18 and 138,059.58

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Solution

The fourth proportional to 245,510.32, 338,765.18 and 138,059.58 is: 190,500.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,510.32 : 338,765.18 = 138,059.58 : x
  2. Step 2: Convert to fraction form
    245,510.32/338,765.18 = 138,059.58/x
  3. Step 3: Cross multiply
    245,510.32x = 338,765.18 × 138,059.58
  4. Step 4: Simplify right side
    245,510.32x = 46,769,779,567.22
  5. Step 5: Solve for x
    x = 46,769,779,567.22/245,510.32
  6. Step 6: Final answer
    x = 190,500.26

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1.5x scale

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.