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Finding the Fourth Proportional to 712,329.60, 983,014.73 and 390,039.64

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Solution

The fourth proportional to 712,329.60, 983,014.73 and 390,039.64 is: 538,254.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,329.60 : 983,014.73 = 390,039.64 : x
  2. Step 2: Convert to fraction form
    712,329.60/983,014.73 = 390,039.64/x
  3. Step 3: Cross multiply
    712,329.60x = 983,014.73 × 390,039.64
  4. Step 4: Simplify right side
    712,329.60x = 383,414,711,403.90
  5. Step 5: Solve for x
    x = 383,414,711,403.90/712,329.60
  6. Step 6: Final answer
    x = 538,254.64

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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.