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Finding the Fourth Proportional to 528,610.76, 729,488.10 and 286,895.48

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Solution

The fourth proportional to 528,610.76, 729,488.10 and 286,895.48 is: 395,918.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,610.76 : 729,488.10 = 286,895.48 : x
  2. Step 2: Convert to fraction form
    528,610.76/729,488.10 = 286,895.48/x
  3. Step 3: Cross multiply
    528,610.76x = 729,488.10 × 286,895.48
  4. Step 4: Simplify right side
    528,610.76x = 209,286,838,603.79
  5. Step 5: Solve for x
    x = 209,286,838,603.79/528,610.76
  6. Step 6: Final answer
    x = 395,918.61

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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.