Home / 643,341.12-887,851.40-371,459.20

Finding the Fourth Proportional to 643,341.12, 887,851.40 and 371,459.20

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Solution

The fourth proportional to 643,341.12, 887,851.40 and 371,459.20 is: 512,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,341.12 : 887,851.40 = 371,459.20 : x
  2. Step 2: Convert to fraction form
    643,341.12/887,851.40 = 371,459.20/x
  3. Step 3: Cross multiply
    643,341.12x = 887,851.40 × 371,459.20
  4. Step 4: Simplify right side
    643,341.12x = 329,800,570,762.88
  5. Step 5: Solve for x
    x = 329,800,570,762.88/643,341.12
  6. Step 6: Final answer
    x = 512,637.17

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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.