Home / 611,916.80-917,875.20-191,321.60

Finding the Fourth Proportional to 611,916.80, 917,875.20 and 191,321.60

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Solution

The fourth proportional to 611,916.80, 917,875.20 and 191,321.60 is: 286,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,916.80 : 917,875.20 = 191,321.60 : x
  2. Step 2: Convert to fraction form
    611,916.80/917,875.20 = 191,321.60/x
  3. Step 3: Cross multiply
    611,916.80x = 917,875.20 × 191,321.60
  4. Step 4: Simplify right side
    611,916.80x = 175,609,351,864.32
  5. Step 5: Solve for x
    x = 175,609,351,864.32/611,916.80
  6. Step 6: Final answer
    x = 286,982.40

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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.