Home / 712,020.15-982,549.77-389,667.90

Finding the Fourth Proportional to 712,020.15, 982,549.77 and 389,667.90

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Solution

The fourth proportional to 712,020.15, 982,549.77 and 389,667.90 is: 537,720.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,020.15 : 982,549.77 = 389,667.90 : x
  2. Step 2: Convert to fraction form
    712,020.15/982,549.77 = 389,667.90/x
  3. Step 3: Cross multiply
    712,020.15x = 982,549.77 × 389,667.90
  4. Step 4: Simplify right side
    712,020.15x = 382,868,105,521.38
  5. Step 5: Solve for x
    x = 382,868,105,521.38/712,020.15
  6. Step 6: Final answer
    x = 537,720.89

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Double scale
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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.