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Finding the Fourth Proportional to 607,390.30, 911,085.45 and 439,428.70

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Solution

The fourth proportional to 607,390.30, 911,085.45 and 439,428.70 is: 659,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,390.30 : 911,085.45 = 439,428.70 : x
  2. Step 2: Convert to fraction form
    607,390.30/911,085.45 = 439,428.70/x
  3. Step 3: Cross multiply
    607,390.30x = 911,085.45 × 439,428.70
  4. Step 4: Simplify right side
    607,390.30x = 400,357,094,882.42
  5. Step 5: Solve for x
    x = 400,357,094,882.42/607,390.30
  6. Step 6: Final answer
    x = 659,143.05

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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.