Home / 712,538.08-983,309.12-486,178.72

Finding the Fourth Proportional to 712,538.08, 983,309.12 and 486,178.72

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Solution

The fourth proportional to 712,538.08, 983,309.12 and 486,178.72 is: 670,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,538.08 : 983,309.12 = 486,178.72 : x
  2. Step 2: Convert to fraction form
    712,538.08/983,309.12 = 486,178.72/x
  3. Step 3: Cross multiply
    712,538.08x = 983,309.12 × 486,178.72
  4. Step 4: Simplify right side
    712,538.08x = 478,063,969,325.93
  5. Step 5: Solve for x
    x = 478,063,969,325.93/712,538.08
  6. Step 6: Final answer
    x = 670,931.12

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Double scale
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Similar ratio
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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.