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Finding the Fourth Proportional to 521,419.28, 719,558.60 and 282,955.28

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Solution

The fourth proportional to 521,419.28, 719,558.60 and 282,955.28 is: 390,478.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,419.28 : 719,558.60 = 282,955.28 : x
  2. Step 2: Convert to fraction form
    521,419.28/719,558.60 = 282,955.28/x
  3. Step 3: Cross multiply
    521,419.28x = 719,558.60 × 282,955.28
  4. Step 4: Simplify right side
    521,419.28x = 203,602,905,139.41
  5. Step 5: Solve for x
    x = 203,602,905,139.41/521,419.28
  6. Step 6: Final answer
    x = 390,478.28

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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.