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Finding the Fourth Proportional to 539,047.20, 808,570.80 and 480,986.40

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Solution

The fourth proportional to 539,047.20, 808,570.80 and 480,986.40 is: 721,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,047.20 : 808,570.80 = 480,986.40 : x
  2. Step 2: Convert to fraction form
    539,047.20/808,570.80 = 480,986.40/x
  3. Step 3: Cross multiply
    539,047.20x = 808,570.80 × 480,986.40
  4. Step 4: Simplify right side
    539,047.20x = 388,911,558,237.12
  5. Step 5: Solve for x
    x = 388,911,558,237.12/539,047.20
  6. Step 6: Final answer
    x = 721,479.60

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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.