Home / 486,985.89-672,028-272,127.72

Finding the Fourth Proportional to 486,985.89, 672,028 and 272,127.72

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Solution

The fourth proportional to 486,985.89, 672,028 and 272,127.72 is: 375,529.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,985.89 : 672,028 = 272,127.72 : x
  2. Step 2: Convert to fraction form
    486,985.89/672,028 = 272,127.72/x
  3. Step 3: Cross multiply
    486,985.89x = 672,028 × 272,127.72
  4. Step 4: Simplify right side
    486,985.89x = 182,877,447,416.16
  5. Step 5: Solve for x
    x = 182,877,447,416.16/486,985.89
  6. Step 6: Final answer
    x = 375,529.25

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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.