Home / 712,734.73-983,585.08-390,423.55

Finding the Fourth Proportional to 712,734.73, 983,585.08 and 390,423.55

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Solution

The fourth proportional to 712,734.73, 983,585.08 and 390,423.55 is: 538,790.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,734.73 : 983,585.08 = 390,423.55 : x
  2. Step 2: Convert to fraction form
    712,734.73/983,585.08 = 390,423.55/x
  3. Step 3: Cross multiply
    712,734.73x = 983,585.08 × 390,423.55
  4. Step 4: Simplify right side
    712,734.73x = 384,014,775,225.61
  5. Step 5: Solve for x
    x = 384,014,775,225.61/712,734.73
  6. Step 6: Final answer
    x = 538,790.61

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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.