Home / 688,376.31-949,576.81-639,665.07

Finding the Fourth Proportional to 688,376.31, 949,576.81 and 639,665.07

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Solution

The fourth proportional to 688,376.31, 949,576.81 and 639,665.07 is: 882,382.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,376.31 : 949,576.81 = 639,665.07 : x
  2. Step 2: Convert to fraction form
    688,376.31/949,576.81 = 639,665.07/x
  3. Step 3: Cross multiply
    688,376.31x = 949,576.81 × 639,665.07
  4. Step 4: Simplify right side
    688,376.31x = 607,411,116,639.03
  5. Step 5: Solve for x
    x = 607,411,116,639.03/688,376.31
  6. Step 6: Final answer
    x = 882,382.37

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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.