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Finding the Fourth Proportional to 409,774.40, 615,160.80 and 260,014.40

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Solution

The fourth proportional to 409,774.40, 615,160.80 and 260,014.40 is: 390,338.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,774.40 : 615,160.80 = 260,014.40 : x
  2. Step 2: Convert to fraction form
    409,774.40/615,160.80 = 260,014.40/x
  3. Step 3: Cross multiply
    409,774.40x = 615,160.80 × 260,014.40
  4. Step 4: Simplify right side
    409,774.40x = 159,950,666,315.52
  5. Step 5: Solve for x
    x = 159,950,666,315.52/409,774.40
  6. Step 6: Final answer
    x = 390,338.36

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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.