Home / 530,129.10-731,561.40-288,405.48

Finding the Fourth Proportional to 530,129.10, 731,561.40 and 288,405.48

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Solution

The fourth proportional to 530,129.10, 731,561.40 and 288,405.48 is: 397,990.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,129.10 : 731,561.40 = 288,405.48 : x
  2. Step 2: Convert to fraction form
    530,129.10/731,561.40 = 288,405.48/x
  3. Step 3: Cross multiply
    530,129.10x = 731,561.40 × 288,405.48
  4. Step 4: Simplify right side
    530,129.10x = 210,986,316,716.47
  5. Step 5: Solve for x
    x = 210,986,316,716.47/530,129.10
  6. Step 6: Final answer
    x = 397,990.45

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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.