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Finding the Fourth Proportional to 660,064.40, 989,866.20 and 344,416.40

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Solution

The fourth proportional to 660,064.40, 989,866.20 and 344,416.40 is: 516,504.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,064.40 : 989,866.20 = 344,416.40 : x
  2. Step 2: Convert to fraction form
    660,064.40/989,866.20 = 344,416.40/x
  3. Step 3: Cross multiply
    660,064.40x = 989,866.20 × 344,416.40
  4. Step 4: Simplify right side
    660,064.40x = 340,926,153,085.68
  5. Step 5: Solve for x
    x = 340,926,153,085.68/660,064.40
  6. Step 6: Final answer
    x = 516,504.38

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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.