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Finding the Fourth Proportional to 740,408.64, 1,021,764 and 400,876.80

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Solution

The fourth proportional to 740,408.64, 1,021,764 and 400,876.80 is: 553,210.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    740,408.64 : 1,021,764 = 400,876.80 : x
  2. Step 2: Convert to fraction form
    740,408.64/1,021,764 = 400,876.80/x
  3. Step 3: Cross multiply
    740,408.64x = 1,021,764 × 400,876.80
  4. Step 4: Simplify right side
    740,408.64x = 409,601,482,675.20
  5. Step 5: Solve for x
    x = 409,601,482,675.20/740,408.64
  6. Step 6: Final answer
    x = 553,210.03

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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.