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Finding the Fourth Proportional to 644,565.60, 889,642.80 and 358,184.16

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Solution

The fourth proportional to 644,565.60, 889,642.80 and 358,184.16 is: 494,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,565.60 : 889,642.80 = 358,184.16 : x
  2. Step 2: Convert to fraction form
    644,565.60/889,642.80 = 358,184.16/x
  3. Step 3: Cross multiply
    644,565.60x = 889,642.80 × 358,184.16
  4. Step 4: Simplify right side
    644,565.60x = 318,655,959,018.05
  5. Step 5: Solve for x
    x = 318,655,959,018.05/644,565.60
  6. Step 6: Final answer
    x = 494,373.20

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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.