Home / 781,886.81-1,078,996.51-442,355.06

Finding the Fourth Proportional to 781,886.81, 1,078,996.51 and 442,355.06

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Solution

The fourth proportional to 781,886.81, 1,078,996.51 and 442,355.06 is: 610,445.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,886.81 : 1,078,996.51 = 442,355.06 : x
  2. Step 2: Convert to fraction form
    781,886.81/1,078,996.51 = 442,355.06/x
  3. Step 3: Cross multiply
    781,886.81x = 1,078,996.51 × 442,355.06
  4. Step 4: Simplify right side
    781,886.81x = 477,299,569,171.28
  5. Step 5: Solve for x
    x = 477,299,569,171.28/781,886.81
  6. Step 6: Final answer
    x = 610,445.86

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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.