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Finding the Fourth Proportional to 712,690.34, 983,139.80 and 440,671.28

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Solution

The fourth proportional to 712,690.34, 983,139.80 and 440,671.28 is: 607,895.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,690.34 : 983,139.80 = 440,671.28 : x
  2. Step 2: Convert to fraction form
    712,690.34/983,139.80 = 440,671.28/x
  3. Step 3: Cross multiply
    712,690.34x = 983,139.80 × 440,671.28
  4. Step 4: Simplify right side
    712,690.34x = 433,241,466,965.89
  5. Step 5: Solve for x
    x = 433,241,466,965.89/712,690.34
  6. Step 6: Final answer
    x = 607,895.81

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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.