Home / 712,705.58-983,533.88-390,427.13

Finding the Fourth Proportional to 712,705.58, 983,533.88 and 390,427.13

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Solution

The fourth proportional to 712,705.58, 983,533.88 and 390,427.13 is: 538,789.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,705.58 : 983,533.88 = 390,427.13 : x
  2. Step 2: Convert to fraction form
    712,705.58/983,533.88 = 390,427.13/x
  3. Step 3: Cross multiply
    712,705.58x = 983,533.88 × 390,427.13
  4. Step 4: Simplify right side
    712,705.58x = 383,998,303,156.36
  5. Step 5: Solve for x
    x = 383,998,303,156.36/712,705.58
  6. Step 6: Final answer
    x = 538,789.53

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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.