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Finding the Fourth Proportional to 518,881.80, 778,905.90 and 401,075.40

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Solution

The fourth proportional to 518,881.80, 778,905.90 and 401,075.40 is: 602,063.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,881.80 : 778,905.90 = 401,075.40 : x
  2. Step 2: Convert to fraction form
    518,881.80/778,905.90 = 401,075.40/x
  3. Step 3: Cross multiply
    518,881.80x = 778,905.90 × 401,075.40
  4. Step 4: Simplify right side
    518,881.80x = 312,399,995,404.86
  5. Step 5: Solve for x
    x = 312,399,995,404.86/518,881.80
  6. Step 6: Final answer
    x = 602,063.89

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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.