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Finding the Fourth Proportional to 528,718.47, 729,612 and 286,995.74

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Solution

The fourth proportional to 528,718.47, 729,612 and 286,995.74 is: 396,043.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,718.47 : 729,612 = 286,995.74 : x
  2. Step 2: Convert to fraction form
    528,718.47/729,612 = 286,995.74/x
  3. Step 3: Cross multiply
    528,718.47x = 729,612 × 286,995.74
  4. Step 4: Simplify right side
    528,718.47x = 209,395,532,204.82
  5. Step 5: Solve for x
    x = 209,395,532,204.82/528,718.47
  6. Step 6: Final answer
    x = 396,043.54

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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.