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Finding the Fourth Proportional to 722,708.12, 997,345.14 and 400,423.26

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Solution

The fourth proportional to 722,708.12, 997,345.14 and 400,423.26 is: 552,588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,708.12 : 997,345.14 = 400,423.26 : x
  2. Step 2: Convert to fraction form
    722,708.12/997,345.14 = 400,423.26/x
  3. Step 3: Cross multiply
    722,708.12x = 997,345.14 × 400,423.26
  4. Step 4: Simplify right side
    722,708.12x = 399,360,192,303.96
  5. Step 5: Solve for x
    x = 399,360,192,303.96/722,708.12
  6. Step 6: Final answer
    x = 552,588.49

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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.