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Finding the Fourth Proportional to 528,643.47, 729,538.87 and 299,200.74

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Solution

The fourth proportional to 528,643.47, 729,538.87 and 299,200.74 is: 412,903.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,643.47 : 729,538.87 = 299,200.74 : x
  2. Step 2: Convert to fraction form
    528,643.47/729,538.87 = 299,200.74/x
  3. Step 3: Cross multiply
    528,643.47x = 729,538.87 × 299,200.74
  4. Step 4: Simplify right side
    528,643.47x = 218,278,569,014.76
  5. Step 5: Solve for x
    x = 218,278,569,014.76/528,643.47
  6. Step 6: Final answer
    x = 412,903.18

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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.