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Finding the Fourth Proportional to 528,485.76, 728,303.54 and 518,769.09

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Solution

The fourth proportional to 528,485.76, 728,303.54 and 518,769.09 is: 714,913.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,485.76 : 728,303.54 = 518,769.09 : x
  2. Step 2: Convert to fraction form
    528,485.76/728,303.54 = 518,769.09/x
  3. Step 3: Cross multiply
    528,485.76x = 728,303.54 × 518,769.09
  4. Step 4: Simplify right side
    528,485.76x = 377,821,362,095.73
  5. Step 5: Solve for x
    x = 377,821,362,095.73/528,485.76
  6. Step 6: Final answer
    x = 714,913.04

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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.