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Finding the Fourth Proportional to 712,058.72, 982,642.48 and 389,789.40

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Solution

The fourth proportional to 712,058.72, 982,642.48 and 389,789.40 is: 537,910.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,058.72 : 982,642.48 = 389,789.40 : x
  2. Step 2: Convert to fraction form
    712,058.72/982,642.48 = 389,789.40/x
  3. Step 3: Cross multiply
    712,058.72x = 982,642.48 × 389,789.40
  4. Step 4: Simplify right side
    712,058.72x = 383,023,622,693.71
  5. Step 5: Solve for x
    x = 383,023,622,693.71/712,058.72
  6. Step 6: Final answer
    x = 537,910.16

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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.