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Finding the Fourth Proportional to 716,872.16, 989,275.74 and 394,575.32

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Solution

The fourth proportional to 716,872.16, 989,275.74 and 394,575.32 is: 544,509.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,872.16 : 989,275.74 = 394,575.32 : x
  2. Step 2: Convert to fraction form
    716,872.16/989,275.74 = 394,575.32/x
  3. Step 3: Cross multiply
    716,872.16x = 989,275.74 × 394,575.32
  4. Step 4: Simplify right side
    716,872.16x = 390,343,791,678.74
  5. Step 5: Solve for x
    x = 390,343,791,678.74/716,872.16
  6. Step 6: Final answer
    x = 544,509.63

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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.