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Finding the Fourth Proportional to 530,707.40, 732,376.45 and 288,989.97

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Solution

The fourth proportional to 530,707.40, 732,376.45 and 288,989.97 is: 398,806.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,707.40 : 732,376.45 = 288,989.97 : x
  2. Step 2: Convert to fraction form
    530,707.40/732,376.45 = 288,989.97/x
  3. Step 3: Cross multiply
    530,707.40x = 732,376.45 × 288,989.97
  4. Step 4: Simplify right side
    530,707.40x = 211,649,444,652.32
  5. Step 5: Solve for x
    x = 211,649,444,652.32/530,707.40
  6. Step 6: Final answer
    x = 398,806.28

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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.