Home / 857,715.60-1,286,573.40-385,323.60

Finding the Fourth Proportional to 857,715.60, 1,286,573.40 and 385,323.60

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Solution

The fourth proportional to 857,715.60, 1,286,573.40 and 385,323.60 is: 577,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,715.60 : 1,286,573.40 = 385,323.60 : x
  2. Step 2: Convert to fraction form
    857,715.60/1,286,573.40 = 385,323.60/x
  3. Step 3: Cross multiply
    857,715.60x = 1,286,573.40 × 385,323.60
  4. Step 4: Simplify right side
    857,715.60x = 495,747,094,152.24
  5. Step 5: Solve for x
    x = 495,747,094,152.24/857,715.60
  6. Step 6: Final answer
    x = 577,985.40

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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.