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Finding the Fourth Proportional to 712,874.88, 983,767.14 and 390,597.21

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Solution

The fourth proportional to 712,874.88, 983,767.14 and 390,597.21 is: 539,024.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,874.88 : 983,767.14 = 390,597.21 : x
  2. Step 2: Convert to fraction form
    712,874.88/983,767.14 = 390,597.21/x
  3. Step 3: Cross multiply
    712,874.88x = 983,767.14 × 390,597.21
  4. Step 4: Simplify right side
    712,874.88x = 384,256,700,173.68
  5. Step 5: Solve for x
    x = 384,256,700,173.68/712,874.88
  6. Step 6: Final answer
    x = 539,024.04

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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.