Home / 679,323.60-1,018,985.40-384,411.60

Finding the Fourth Proportional to 679,323.60, 1,018,985.40 and 384,411.60

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Solution

The fourth proportional to 679,323.60, 1,018,985.40 and 384,411.60 is: 576,617.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,323.60 : 1,018,985.40 = 384,411.60 : x
  2. Step 2: Convert to fraction form
    679,323.60/1,018,985.40 = 384,411.60/x
  3. Step 3: Cross multiply
    679,323.60x = 1,018,985.40 × 384,411.60
  4. Step 4: Simplify right side
    679,323.60x = 391,709,807,990.64
  5. Step 5: Solve for x
    x = 391,709,807,990.64/679,323.60
  6. Step 6: Final answer
    x = 576,617.40

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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.