Home / 712,921.49-1,069,517.10-286,490.51

Finding the Fourth Proportional to 712,921.49, 1,069,517.10 and 286,490.51

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Solution

The fourth proportional to 712,921.49, 1,069,517.10 and 286,490.51 is: 429,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,921.49 : 1,069,517.10 = 286,490.51 : x
  2. Step 2: Convert to fraction form
    712,921.49/1,069,517.10 = 286,490.51/x
  3. Step 3: Cross multiply
    712,921.49x = 1,069,517.10 × 286,490.51
  4. Step 4: Simplify right side
    712,921.49x = 306,406,499,432.72
  5. Step 5: Solve for x
    x = 306,406,499,432.72/712,921.49
  6. Step 6: Final answer
    x = 429,789.96

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.