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Finding the Fourth Proportional to 456,890.40, 683,780.40 and 400,903.20

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Solution

The fourth proportional to 456,890.40, 683,780.40 and 400,903.20 is: 599,990.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,890.40 : 683,780.40 = 400,903.20 : x
  2. Step 2: Convert to fraction form
    456,890.40/683,780.40 = 400,903.20/x
  3. Step 3: Cross multiply
    456,890.40x = 683,780.40 × 400,903.20
  4. Step 4: Simplify right side
    456,890.40x = 274,129,750,457.28
  5. Step 5: Solve for x
    x = 274,129,750,457.28/456,890.40
  6. Step 6: Final answer
    x = 599,990.17

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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.