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Finding the Fourth Proportional to 712,735.98, 983,586.80 and 390,424.80

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Solution

The fourth proportional to 712,735.98, 983,586.80 and 390,424.80 is: 538,792.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,735.98 : 983,586.80 = 390,424.80 : x
  2. Step 2: Convert to fraction form
    712,735.98/983,586.80 = 390,424.80/x
  3. Step 3: Cross multiply
    712,735.98x = 983,586.80 × 390,424.80
  4. Step 4: Simplify right side
    712,735.98x = 384,016,679,672.64
  5. Step 5: Solve for x
    x = 384,016,679,672.64/712,735.98
  6. Step 6: Final answer
    x = 538,792.33

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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.