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Finding the Fourth Proportional to 279,210.61, 385,223.70 and 158,342.41

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Solution

The fourth proportional to 279,210.61, 385,223.70 and 158,342.41 is: 218,463.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,210.61 : 385,223.70 = 158,342.41 : x
  2. Step 2: Convert to fraction form
    279,210.61/385,223.70 = 158,342.41/x
  3. Step 3: Cross multiply
    279,210.61x = 385,223.70 × 158,342.41
  4. Step 4: Simplify right side
    279,210.61x = 60,997,249,047.12
  5. Step 5: Solve for x
    x = 60,997,249,047.12/279,210.61
  6. Step 6: Final answer
    x = 218,463.22

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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.