Home / 387,398,049.32-534,604,890.02-211,182,157.28

Finding the Fourth Proportional to 387,398,049.32, 534,604,890.02 and 211,182,157.28

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Solution

The fourth proportional to 387,398,049.32, 534,604,890.02 and 211,182,157.28 is: 291,428,968.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,398,049.32 : 534,604,890.02 = 211,182,157.28 : x
  2. Step 2: Convert to fraction form
    387,398,049.32/534,604,890.02 = 211,182,157.28/x
  3. Step 3: Cross multiply
    387,398,049.32x = 534,604,890.02 × 211,182,157.28
  4. Step 4: Simplify right side
    387,398,049.32x = 112,899,013,966,860,736
  5. Step 5: Solve for x
    x = 112,899,013,966,860,736/387,398,049.32
  6. Step 6: Final answer
    x = 291,428,968.64

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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.