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Finding the Fourth Proportional to 666,465.51, 919,699.51 and 380,077.77

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Solution

The fourth proportional to 666,465.51, 919,699.51 and 380,077.77 is: 524,494.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,465.51 : 919,699.51 = 380,077.77 : x
  2. Step 2: Convert to fraction form
    666,465.51/919,699.51 = 380,077.77/x
  3. Step 3: Cross multiply
    666,465.51x = 919,699.51 × 380,077.77
  4. Step 4: Simplify right side
    666,465.51x = 349,557,338,830.89
  5. Step 5: Solve for x
    x = 349,557,338,830.89/666,465.51
  6. Step 6: Final answer
    x = 524,494.27

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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.