Home / 672,128.90-1,008,193.35-620,807.30

Finding the Fourth Proportional to 672,128.90, 1,008,193.35 and 620,807.30

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Solution

The fourth proportional to 672,128.90, 1,008,193.35 and 620,807.30 is: 931,210.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,128.90 : 1,008,193.35 = 620,807.30 : x
  2. Step 2: Convert to fraction form
    672,128.90/1,008,193.35 = 620,807.30/x
  3. Step 3: Cross multiply
    672,128.90x = 1,008,193.35 × 620,807.30
  4. Step 4: Simplify right side
    672,128.90x = 625,893,791,491.46
  5. Step 5: Solve for x
    x = 625,893,791,491.46/672,128.90
  6. Step 6: Final answer
    x = 931,210.95

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.