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Finding the Fourth Proportional to 309,909.30, 464,863.95 and 291,246.90

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Solution

The fourth proportional to 309,909.30, 464,863.95 and 291,246.90 is: 436,870.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,909.30 : 464,863.95 = 291,246.90 : x
  2. Step 2: Convert to fraction form
    309,909.30/464,863.95 = 291,246.90/x
  3. Step 3: Cross multiply
    309,909.30x = 464,863.95 × 291,246.90
  4. Step 4: Simplify right side
    309,909.30x = 135,390,184,359.26
  5. Step 5: Solve for x
    x = 135,390,184,359.26/309,909.30
  6. Step 6: Final answer
    x = 436,870.35

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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.