Home / 727,123.65-1,003,430.63-421,259.15

Finding the Fourth Proportional to 727,123.65, 1,003,430.63 and 421,259.15

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Solution

The fourth proportional to 727,123.65, 1,003,430.63 and 421,259.15 is: 581,337.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,123.65 : 1,003,430.63 = 421,259.15 : x
  2. Step 2: Convert to fraction form
    727,123.65/1,003,430.63 = 421,259.15/x
  3. Step 3: Cross multiply
    727,123.65x = 1,003,430.63 × 421,259.15
  4. Step 4: Simplify right side
    727,123.65x = 422,704,332,195.19
  5. Step 5: Solve for x
    x = 422,704,332,195.19/727,123.65
  6. Step 6: Final answer
    x = 581,337.62

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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.