Home / 1,390,637.19-2,086,279.29-431,041.89

Finding the Fourth Proportional to 1,390,637.19, 2,086,279.29 and 431,041.89

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Solution

The fourth proportional to 1,390,637.19, 2,086,279.29 and 431,041.89 is: 646,663.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,637.19 : 2,086,279.29 = 431,041.89 : x
  2. Step 2: Convert to fraction form
    1,390,637.19/2,086,279.29 = 431,041.89/x
  3. Step 3: Cross multiply
    1,390,637.19x = 2,086,279.29 × 431,041.89
  4. Step 4: Simplify right side
    1,390,637.19x = 899,273,768,229.46
  5. Step 5: Solve for x
    x = 899,273,768,229.46/1,390,637.19
  6. Step 6: Final answer
    x = 646,663.11

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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.