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Finding the Fourth Proportional to 712,807.26, 983,675.82 and 390,523.74

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Solution

The fourth proportional to 712,807.26, 983,675.82 and 390,523.74 is: 538,923.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,807.26 : 983,675.82 = 390,523.74 : x
  2. Step 2: Convert to fraction form
    712,807.26/983,675.82 = 390,523.74/x
  3. Step 3: Cross multiply
    712,807.26x = 983,675.82 × 390,523.74
  4. Step 4: Simplify right side
    712,807.26x = 384,148,760,173.97
  5. Step 5: Solve for x
    x = 384,148,760,173.97/712,807.26
  6. Step 6: Final answer
    x = 538,923.75

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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.