Home / 865,698.90-1,298,548.35-393,306.90

Finding the Fourth Proportional to 865,698.90, 1,298,548.35 and 393,306.90

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Solution

The fourth proportional to 865,698.90, 1,298,548.35 and 393,306.90 is: 589,960.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,698.90 : 1,298,548.35 = 393,306.90 : x
  2. Step 2: Convert to fraction form
    865,698.90/1,298,548.35 = 393,306.90/x
  3. Step 3: Cross multiply
    865,698.90x = 1,298,548.35 × 393,306.90
  4. Step 4: Simplify right side
    865,698.90x = 510,728,026,038.62
  5. Step 5: Solve for x
    x = 510,728,026,038.62/865,698.90
  6. Step 6: Final answer
    x = 589,960.35

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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.