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Finding the Fourth Proportional to 528,428.76, 729,208.62 and 302,088.84

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Solution

The fourth proportional to 528,428.76, 729,208.62 and 302,088.84 is: 416,869.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,428.76 : 729,208.62 = 302,088.84 : x
  2. Step 2: Convert to fraction form
    528,428.76/729,208.62 = 302,088.84/x
  3. Step 3: Cross multiply
    528,428.76x = 729,208.62 × 302,088.84
  4. Step 4: Simplify right side
    528,428.76x = 220,285,786,133.80
  5. Step 5: Solve for x
    x = 220,285,786,133.80/528,428.76
  6. Step 6: Final answer
    x = 416,869.41

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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.