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Finding the Fourth Proportional to 260,513.39, 390,762.79 and 83,031.05

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Solution

The fourth proportional to 260,513.39, 390,762.79 and 83,031.05 is: 124,544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,513.39 : 390,762.79 = 83,031.05 : x
  2. Step 2: Convert to fraction form
    260,513.39/390,762.79 = 83,031.05/x
  3. Step 3: Cross multiply
    260,513.39x = 390,762.79 × 83,031.05
  4. Step 4: Simplify right side
    260,513.39x = 32,445,444,754.63
  5. Step 5: Solve for x
    x = 32,445,444,754.63/260,513.39
  6. Step 6: Final answer
    x = 124,544.25

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1.5x scale

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.