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Finding the Fourth Proportional to 528,356.19, 729,133.73 and 286,640.52

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Solution

The fourth proportional to 528,356.19, 729,133.73 and 286,640.52 is: 395,565.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,356.19 : 729,133.73 = 286,640.52 : x
  2. Step 2: Convert to fraction form
    528,356.19/729,133.73 = 286,640.52/x
  3. Step 3: Cross multiply
    528,356.19x = 729,133.73 × 286,640.52
  4. Step 4: Simplify right side
    528,356.19x = 208,999,271,719.39
  5. Step 5: Solve for x
    x = 208,999,271,719.39/528,356.19
  6. Step 6: Final answer
    x = 395,565.10

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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.