Home / 688,071.28-949,531.80-386,263.12

Finding the Fourth Proportional to 688,071.28, 949,531.80 and 386,263.12

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Solution

The fourth proportional to 688,071.28, 949,531.80 and 386,263.12 is: 533,039.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,071.28 : 949,531.80 = 386,263.12 : x
  2. Step 2: Convert to fraction form
    688,071.28/949,531.80 = 386,263.12/x
  3. Step 3: Cross multiply
    688,071.28x = 949,531.80 × 386,263.12
  4. Step 4: Simplify right side
    688,071.28x = 366,769,115,607.22
  5. Step 5: Solve for x
    x = 366,769,115,607.22/688,071.28
  6. Step 6: Final answer
    x = 533,039.42

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Double scale
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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.