Home / 763,417.70-1,145,126.55-343,513.70

Finding the Fourth Proportional to 763,417.70, 1,145,126.55 and 343,513.70

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Solution

The fourth proportional to 763,417.70, 1,145,126.55 and 343,513.70 is: 515,270.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,417.70 : 1,145,126.55 = 343,513.70 : x
  2. Step 2: Convert to fraction form
    763,417.70/1,145,126.55 = 343,513.70/x
  3. Step 3: Cross multiply
    763,417.70x = 1,145,126.55 × 343,513.70
  4. Step 4: Simplify right side
    763,417.70x = 393,366,658,158.74
  5. Step 5: Solve for x
    x = 393,366,658,158.74/763,417.70
  6. Step 6: Final answer
    x = 515,270.55

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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.