Home / 656,117.12-905,475.20-401,388.80

Finding the Fourth Proportional to 656,117.12, 905,475.20 and 401,388.80

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Solution

The fourth proportional to 656,117.12, 905,475.20 and 401,388.80 is: 553,937.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,117.12 : 905,475.20 = 401,388.80 : x
  2. Step 2: Convert to fraction form
    656,117.12/905,475.20 = 401,388.80/x
  3. Step 3: Cross multiply
    656,117.12x = 905,475.20 × 401,388.80
  4. Step 4: Simplify right side
    656,117.12x = 363,447,603,957.76
  5. Step 5: Solve for x
    x = 363,447,603,957.76/656,117.12
  6. Step 6: Final answer
    x = 553,937.08

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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.