Home / 712,705.39-983,533.62-390,426.94

Finding the Fourth Proportional to 712,705.39, 983,533.62 and 390,426.94

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Solution

The fourth proportional to 712,705.39, 983,533.62 and 390,426.94 is: 538,789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,705.39 : 983,533.62 = 390,426.94 : x
  2. Step 2: Convert to fraction form
    712,705.39/983,533.62 = 390,426.94/x
  3. Step 3: Cross multiply
    712,705.39x = 983,533.62 × 390,426.94
  4. Step 4: Simplify right side
    712,705.39x = 383,998,018,950.21
  5. Step 5: Solve for x
    x = 383,998,018,950.21/712,705.39
  6. Step 6: Final answer
    x = 538,789.28

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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.