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Finding the Fourth Proportional to 528,235.12, 728,959.10 and 286,512.50

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Solution

The fourth proportional to 528,235.12, 728,959.10 and 286,512.50 is: 395,384.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,235.12 : 728,959.10 = 286,512.50 : x
  2. Step 2: Convert to fraction form
    528,235.12/728,959.10 = 286,512.50/x
  3. Step 3: Cross multiply
    528,235.12x = 728,959.10 × 286,512.50
  4. Step 4: Simplify right side
    528,235.12x = 208,855,891,600.07
  5. Step 5: Solve for x
    x = 208,855,891,600.07/528,235.12
  6. Step 6: Final answer
    x = 395,384.34

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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.