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Finding the Fourth Proportional to 530,428.05, 732,006.17 and 288,726.21

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Solution

The fourth proportional to 530,428.05, 732,006.17 and 288,726.21 is: 398,450.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,428.05 : 732,006.17 = 288,726.21 : x
  2. Step 2: Convert to fraction form
    530,428.05/732,006.17 = 288,726.21/x
  3. Step 3: Cross multiply
    530,428.05x = 732,006.17 × 288,726.21
  4. Step 4: Simplify right side
    530,428.05x = 211,349,365,717.09
  5. Step 5: Solve for x
    x = 211,349,365,717.09/530,428.05
  6. Step 6: Final answer
    x = 398,450.58

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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.