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Finding the Fourth Proportional to 345,809.28, 477,307.20 and 225,281.28

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Solution

The fourth proportional to 345,809.28, 477,307.20 and 225,281.28 is: 310,947.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,809.28 : 477,307.20 = 225,281.28 : x
  2. Step 2: Convert to fraction form
    345,809.28/477,307.20 = 225,281.28/x
  3. Step 3: Cross multiply
    345,809.28x = 477,307.20 × 225,281.28
  4. Step 4: Simplify right side
    345,809.28x = 107,528,376,969.22
  5. Step 5: Solve for x
    x = 107,528,376,969.22/345,809.28
  6. Step 6: Final answer
    x = 310,947.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.