Home / 709,743.60-1,064,615.40-289,321.20

Finding the Fourth Proportional to 709,743.60, 1,064,615.40 and 289,321.20

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Solution

The fourth proportional to 709,743.60, 1,064,615.40 and 289,321.20 is: 433,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,743.60 : 1,064,615.40 = 289,321.20 : x
  2. Step 2: Convert to fraction form
    709,743.60/1,064,615.40 = 289,321.20/x
  3. Step 3: Cross multiply
    709,743.60x = 1,064,615.40 × 289,321.20
  4. Step 4: Simplify right side
    709,743.60x = 308,015,805,066.48
  5. Step 5: Solve for x
    x = 308,015,805,066.48/709,743.60
  6. Step 6: Final answer
    x = 433,981.80

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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.