Home / 712,731.66-983,534.85-390,443.46

Finding the Fourth Proportional to 712,731.66, 983,534.85 and 390,443.46

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Solution

The fourth proportional to 712,731.66, 983,534.85 and 390,443.46 is: 538,792.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,731.66 : 983,534.85 = 390,443.46 : x
  2. Step 2: Convert to fraction form
    712,731.66/983,534.85 = 390,443.46/x
  3. Step 3: Cross multiply
    712,731.66x = 983,534.85 × 390,443.46
  4. Step 4: Simplify right side
    712,731.66x = 384,014,749,864.58
  5. Step 5: Solve for x
    x = 384,014,749,864.58/712,731.66
  6. Step 6: Final answer
    x = 538,792.89

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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.