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Finding the Fourth Proportional to 660,209.48, 990,314.21 and 360,526.59

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Solution

The fourth proportional to 660,209.48, 990,314.21 and 360,526.59 is: 540,789.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,209.48 : 990,314.21 = 360,526.59 : x
  2. Step 2: Convert to fraction form
    660,209.48/990,314.21 = 360,526.59/x
  3. Step 3: Cross multiply
    660,209.48x = 990,314.21 × 360,526.59
  4. Step 4: Simplify right side
    660,209.48x = 357,034,602,347.48
  5. Step 5: Solve for x
    x = 357,034,602,347.48/660,209.48
  6. Step 6: Final answer
    x = 540,789.88

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Similar ratio
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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.