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Finding the Fourth Proportional to 708,357, 977,594.10 and 390,466.44

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Solution

The fourth proportional to 708,357, 977,594.10 and 390,466.44 is: 538,877.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,357 : 977,594.10 = 390,466.44 : x
  2. Step 2: Convert to fraction form
    708,357/977,594.10 = 390,466.44/x
  3. Step 3: Cross multiply
    708,357x = 977,594.10 × 390,466.44
  4. Step 4: Simplify right side
    708,357x = 381,717,687,992.00
  5. Step 5: Solve for x
    x = 381,717,687,992.00/708,357
  6. Step 6: Final answer
    x = 538,877.55

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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.