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Finding the Fourth Proportional to 677,031.12, 934,266.96 and 390,534.12

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Solution

The fourth proportional to 677,031.12, 934,266.96 and 390,534.12 is: 538,916.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,031.12 : 934,266.96 = 390,534.12 : x
  2. Step 2: Convert to fraction form
    677,031.12/934,266.96 = 390,534.12/x
  3. Step 3: Cross multiply
    677,031.12x = 934,266.96 × 390,534.12
  4. Step 4: Simplify right side
    677,031.12x = 364,863,125,068.68
  5. Step 5: Solve for x
    x = 364,863,125,068.68/677,031.12
  6. Step 6: Final answer
    x = 538,916.33

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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.