Home / 621,123.60-931,685.40-408,547.20

Finding the Fourth Proportional to 621,123.60, 931,685.40 and 408,547.20

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Solution

The fourth proportional to 621,123.60, 931,685.40 and 408,547.20 is: 612,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,123.60 : 931,685.40 = 408,547.20 : x
  2. Step 2: Convert to fraction form
    621,123.60/931,685.40 = 408,547.20/x
  3. Step 3: Cross multiply
    621,123.60x = 931,685.40 × 408,547.20
  4. Step 4: Simplify right side
    621,123.60x = 380,637,461,450.88
  5. Step 5: Solve for x
    x = 380,637,461,450.88/621,123.60
  6. Step 6: Final answer
    x = 612,820.80

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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.