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Finding the Fourth Proportional to 660,349.10, 990,523.65 and 239,570.30

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Solution

The fourth proportional to 660,349.10, 990,523.65 and 239,570.30 is: 359,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,349.10 : 990,523.65 = 239,570.30 : x
  2. Step 2: Convert to fraction form
    660,349.10/990,523.65 = 239,570.30/x
  3. Step 3: Cross multiply
    660,349.10x = 990,523.65 × 239,570.30
  4. Step 4: Simplify right side
    660,349.10x = 237,300,047,987.60
  5. Step 5: Solve for x
    x = 237,300,047,987.60/660,349.10
  6. Step 6: Final answer
    x = 359,355.45

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Double scale
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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.