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Finding the Fourth Proportional to 528,252.21, 728,968.35 and 286,526.75

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Solution

The fourth proportional to 528,252.21, 728,968.35 and 286,526.75 is: 395,396.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,252.21 : 728,968.35 = 286,526.75 : x
  2. Step 2: Convert to fraction form
    528,252.21/728,968.35 = 286,526.75/x
  3. Step 3: Cross multiply
    528,252.21x = 728,968.35 × 286,526.75
  4. Step 4: Simplify right side
    528,252.21x = 208,868,928,533.52
  5. Step 5: Solve for x
    x = 208,868,928,533.52/528,252.21
  6. Step 6: Final answer
    x = 395,396.22

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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.