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Finding the Fourth Proportional to 456,750.40, 685,903.20 and 338,555.20

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Solution

The fourth proportional to 456,750.40, 685,903.20 and 338,555.20 is: 508,409.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,750.40 : 685,903.20 = 338,555.20 : x
  2. Step 2: Convert to fraction form
    456,750.40/685,903.20 = 338,555.20/x
  3. Step 3: Cross multiply
    456,750.40x = 685,903.20 × 338,555.20
  4. Step 4: Simplify right side
    456,750.40x = 232,216,095,056.64
  5. Step 5: Solve for x
    x = 232,216,095,056.64/456,750.40
  6. Step 6: Final answer
    x = 508,409.18

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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.