Home / 712,920.57-983,829.83-390,650.73

Finding the Fourth Proportional to 712,920.57, 983,829.83 and 390,650.73

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Solution

The fourth proportional to 712,920.57, 983,829.83 and 390,650.73 is: 539,097.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,920.57 : 983,829.83 = 390,650.73 : x
  2. Step 2: Convert to fraction form
    712,920.57/983,829.83 = 390,650.73/x
  3. Step 3: Cross multiply
    712,920.57x = 983,829.83 × 390,650.73
  4. Step 4: Simplify right side
    712,920.57x = 384,333,839,332.02
  5. Step 5: Solve for x
    x = 384,333,839,332.02/712,920.57
  6. Step 6: Final answer
    x = 539,097.70

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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.