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Finding the Fourth Proportional to 260,423.40, 390,656.70 and 82,925.40

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Solution

The fourth proportional to 260,423.40, 390,656.70 and 82,925.40 is: 124,394.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,423.40 : 390,656.70 = 82,925.40 : x
  2. Step 2: Convert to fraction form
    260,423.40/390,656.70 = 82,925.40/x
  3. Step 3: Cross multiply
    260,423.40x = 390,656.70 × 82,925.40
  4. Step 4: Simplify right side
    260,423.40x = 32,395,363,110.18
  5. Step 5: Solve for x
    x = 32,395,363,110.18/260,423.40
  6. Step 6: Final answer
    x = 124,394.98

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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.