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Finding the Fourth Proportional to 659,453.51, 909,756.90 and 387,398.67

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Solution

The fourth proportional to 659,453.51, 909,756.90 and 387,398.67 is: 534,440.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,453.51 : 909,756.90 = 387,398.67 : x
  2. Step 2: Convert to fraction form
    659,453.51/909,756.90 = 387,398.67/x
  3. Step 3: Cross multiply
    659,453.51x = 909,756.90 × 387,398.67
  4. Step 4: Simplify right side
    659,453.51x = 352,438,613,083.32
  5. Step 5: Solve for x
    x = 352,438,613,083.32/659,453.51
  6. Step 6: Final answer
    x = 534,440.43

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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.