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Finding the Fourth Proportional to 657,643.20, 986,464.80 and 480,496.20

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Solution

The fourth proportional to 657,643.20, 986,464.80 and 480,496.20 is: 720,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,643.20 : 986,464.80 = 480,496.20 : x
  2. Step 2: Convert to fraction form
    657,643.20/986,464.80 = 480,496.20/x
  3. Step 3: Cross multiply
    657,643.20x = 986,464.80 × 480,496.20
  4. Step 4: Simplify right side
    657,643.20x = 473,992,587,833.76
  5. Step 5: Solve for x
    x = 473,992,587,833.76/657,643.20
  6. Step 6: Final answer
    x = 720,744.30

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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.