Home / 438,017.21-657,047.35-213,569.51

Finding the Fourth Proportional to 438,017.21, 657,047.35 and 213,569.51

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Solution

The fourth proportional to 438,017.21, 657,047.35 and 213,569.51 is: 320,364.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,017.21 : 657,047.35 = 213,569.51 : x
  2. Step 2: Convert to fraction form
    438,017.21/657,047.35 = 213,569.51/x
  3. Step 3: Cross multiply
    438,017.21x = 657,047.35 × 213,569.51
  4. Step 4: Simplify right side
    438,017.21x = 140,325,276,767.14
  5. Step 5: Solve for x
    x = 140,325,276,767.14/438,017.21
  6. Step 6: Final answer
    x = 320,364.75

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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.