Home / 712,827.20-983,702.36-390,557.92

Finding the Fourth Proportional to 712,827.20, 983,702.36 and 390,557.92

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Solution

The fourth proportional to 712,827.20, 983,702.36 and 390,557.92 is: 538,970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,827.20 : 983,702.36 = 390,557.92 : x
  2. Step 2: Convert to fraction form
    712,827.20/983,702.36 = 390,557.92/x
  3. Step 3: Cross multiply
    712,827.20x = 983,702.36 × 390,557.92
  4. Step 4: Simplify right side
    712,827.20x = 384,192,747,620.69
  5. Step 5: Solve for x
    x = 384,192,747,620.69/712,827.20
  6. Step 6: Final answer
    x = 538,970.38

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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.