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Finding the Fourth Proportional to 528,364.84, 729,143.40 and 302,015.20

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Solution

The fourth proportional to 528,364.84, 729,143.40 and 302,015.20 is: 416,780.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,364.84 : 729,143.40 = 302,015.20 : x
  2. Step 2: Convert to fraction form
    528,364.84/729,143.40 = 302,015.20/x
  3. Step 3: Cross multiply
    528,364.84x = 729,143.40 × 302,015.20
  4. Step 4: Simplify right side
    528,364.84x = 220,212,389,779.68
  5. Step 5: Solve for x
    x = 220,212,389,779.68/528,364.84
  6. Step 6: Final answer
    x = 416,780.93

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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.