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Finding the Fourth Proportional to 528,624.90, 729,503.08 and 286,907.47

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Solution

The fourth proportional to 528,624.90, 729,503.08 and 286,907.47 is: 395,932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,624.90 : 729,503.08 = 286,907.47 : x
  2. Step 2: Convert to fraction form
    528,624.90/729,503.08 = 286,907.47/x
  3. Step 3: Cross multiply
    528,624.90x = 729,503.08 × 286,907.47
  4. Step 4: Simplify right side
    528,624.90x = 209,299,880,498.98
  5. Step 5: Solve for x
    x = 209,299,880,498.98/528,624.90
  6. Step 6: Final answer
    x = 395,932.69

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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.