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Finding the Fourth Proportional to 528,236.79, 728,962.52 and 286,518.75

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Solution

The fourth proportional to 528,236.79, 728,962.52 and 286,518.75 is: 395,393.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,236.79 : 728,962.52 = 286,518.75 : x
  2. Step 2: Convert to fraction form
    528,236.79/728,962.52 = 286,518.75/x
  3. Step 3: Cross multiply
    528,236.79x = 728,962.52 × 286,518.75
  4. Step 4: Simplify right side
    528,236.79x = 208,861,428,594.66
  5. Step 5: Solve for x
    x = 208,861,428,594.66/528,236.79
  6. Step 6: Final answer
    x = 395,393.57

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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.