Home / 712,599.20-983,386.68-390,329.36

Finding the Fourth Proportional to 712,599.20, 983,386.68 and 390,329.36

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Solution

The fourth proportional to 712,599.20, 983,386.68 and 390,329.36 is: 538,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,599.20 : 983,386.68 = 390,329.36 : x
  2. Step 2: Convert to fraction form
    712,599.20/983,386.68 = 390,329.36/x
  3. Step 3: Cross multiply
    712,599.20x = 983,386.68 × 390,329.36
  4. Step 4: Simplify right side
    712,599.20x = 383,844,693,436.93
  5. Step 5: Solve for x
    x = 383,844,693,436.93/712,599.20
  6. Step 6: Final answer
    x = 538,654.40

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Similar ratio
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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.