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Finding the Fourth Proportional to 400,778.83, 553,075.64 and 217,019.42

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Solution

The fourth proportional to 400,778.83, 553,075.64 and 217,019.42 is: 299,487.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,778.83 : 553,075.64 = 217,019.42 : x
  2. Step 2: Convert to fraction form
    400,778.83/553,075.64 = 217,019.42/x
  3. Step 3: Cross multiply
    400,778.83x = 553,075.64 × 217,019.42
  4. Step 4: Simplify right side
    400,778.83x = 120,028,152,386.10
  5. Step 5: Solve for x
    x = 120,028,152,386.10/400,778.83
  6. Step 6: Final answer
    x = 299,487.26

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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.