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Finding the Fourth Proportional to 695,988.78, 960,531.93 and 390,117.12

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Solution

The fourth proportional to 695,988.78, 960,531.93 and 390,117.12 is: 538,399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,988.78 : 960,531.93 = 390,117.12 : x
  2. Step 2: Convert to fraction form
    695,988.78/960,531.93 = 390,117.12/x
  3. Step 3: Cross multiply
    695,988.78x = 960,531.93 × 390,117.12
  4. Step 4: Simplify right side
    695,988.78x = 374,719,950,199.64
  5. Step 5: Solve for x
    x = 374,719,950,199.64/695,988.78
  6. Step 6: Final answer
    x = 538,399.41

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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.