Home / 859,140.60-1,288,710.90-433,987.80

Finding the Fourth Proportional to 859,140.60, 1,288,710.90 and 433,987.80

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Solution

The fourth proportional to 859,140.60, 1,288,710.90 and 433,987.80 is: 650,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,140.60 : 1,288,710.90 = 433,987.80 : x
  2. Step 2: Convert to fraction form
    859,140.60/1,288,710.90 = 433,987.80/x
  3. Step 3: Cross multiply
    859,140.60x = 1,288,710.90 × 433,987.80
  4. Step 4: Simplify right side
    859,140.60x = 559,284,808,327.02
  5. Step 5: Solve for x
    x = 559,284,808,327.02/859,140.60
  6. Step 6: Final answer
    x = 650,981.70

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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.