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Finding the Fourth Proportional to 279,752.16, 386,053.12 and 152,428.80

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Solution

The fourth proportional to 279,752.16, 386,053.12 and 152,428.80 is: 210,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,752.16 : 386,053.12 = 152,428.80 : x
  2. Step 2: Convert to fraction form
    279,752.16/386,053.12 = 152,428.80/x
  3. Step 3: Cross multiply
    279,752.16x = 386,053.12 × 152,428.80
  4. Step 4: Simplify right side
    279,752.16x = 58,845,613,817.86
  5. Step 5: Solve for x
    x = 58,845,613,817.86/279,752.16
  6. Step 6: Final answer
    x = 210,349.10

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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.