Home / 712,542.15-983,271.33-390,190.05

Finding the Fourth Proportional to 712,542.15, 983,271.33 and 390,190.05

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Solution

The fourth proportional to 712,542.15, 983,271.33 and 390,190.05 is: 538,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,542.15 : 983,271.33 = 390,190.05 : x
  2. Step 2: Convert to fraction form
    712,542.15/983,271.33 = 390,190.05/x
  3. Step 3: Cross multiply
    712,542.15x = 983,271.33 × 390,190.05
  4. Step 4: Simplify right side
    712,542.15x = 383,662,689,416.27
  5. Step 5: Solve for x
    x = 383,662,689,416.27/712,542.15
  6. Step 6: Final answer
    x = 538,442.10

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Half scale
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Double scale
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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.