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Finding the Fourth Proportional to 660,816.50, 990,215.42 and 491,518.13

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Solution

The fourth proportional to 660,816.50, 990,215.42 and 491,518.13 is: 736,526.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,816.50 : 990,215.42 = 491,518.13 : x
  2. Step 2: Convert to fraction form
    660,816.50/990,215.42 = 491,518.13/x
  3. Step 3: Cross multiply
    660,816.50x = 990,215.42 × 491,518.13
  4. Step 4: Simplify right side
    660,816.50x = 486,708,824,126.90
  5. Step 5: Solve for x
    x = 486,708,824,126.90/660,816.50
  6. Step 6: Final answer
    x = 736,526.45

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Double scale
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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.