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Finding the Fourth Proportional to 661,642.90, 992,464.35 and 483,313.30

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Solution

The fourth proportional to 661,642.90, 992,464.35 and 483,313.30 is: 724,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,642.90 : 992,464.35 = 483,313.30 : x
  2. Step 2: Convert to fraction form
    661,642.90/992,464.35 = 483,313.30/x
  3. Step 3: Cross multiply
    661,642.90x = 992,464.35 × 483,313.30
  4. Step 4: Simplify right side
    661,642.90x = 479,671,220,130.86
  5. Step 5: Solve for x
    x = 479,671,220,130.86/661,642.90
  6. Step 6: Final answer
    x = 724,969.95

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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.