Home / 783,138.10-1,174,707.15-513,699.70

Finding the Fourth Proportional to 783,138.10, 1,174,707.15 and 513,699.70

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Solution

The fourth proportional to 783,138.10, 1,174,707.15 and 513,699.70 is: 770,549.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,138.10 : 1,174,707.15 = 513,699.70 : x
  2. Step 2: Convert to fraction form
    783,138.10/1,174,707.15 = 513,699.70/x
  3. Step 3: Cross multiply
    783,138.10x = 1,174,707.15 × 513,699.70
  4. Step 4: Simplify right side
    783,138.10x = 603,446,710,542.86
  5. Step 5: Solve for x
    x = 603,446,710,542.86/783,138.10
  6. Step 6: Final answer
    x = 770,549.55

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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.