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Finding the Fourth Proportional to 615,421.80, 923,478.30 and 260,375.40

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Solution

The fourth proportional to 615,421.80, 923,478.30 and 260,375.40 is: 390,709.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,421.80 : 923,478.30 = 260,375.40 : x
  2. Step 2: Convert to fraction form
    615,421.80/923,478.30 = 260,375.40/x
  3. Step 3: Cross multiply
    615,421.80x = 923,478.30 × 260,375.40
  4. Step 4: Simplify right side
    615,421.80x = 240,451,031,753.82
  5. Step 5: Solve for x
    x = 240,451,031,753.82/615,421.80
  6. Step 6: Final answer
    x = 390,709.32

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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.