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Finding the Fourth Proportional to 618,904.74, 854,368.40 and 389,798.74

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Solution

The fourth proportional to 618,904.74, 854,368.40 and 389,798.74 is: 538,098.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,904.74 : 854,368.40 = 389,798.74 : x
  2. Step 2: Convert to fraction form
    618,904.74/854,368.40 = 389,798.74/x
  3. Step 3: Cross multiply
    618,904.74x = 854,368.40 × 389,798.74
  4. Step 4: Simplify right side
    618,904.74x = 333,031,725,815.82
  5. Step 5: Solve for x
    x = 333,031,725,815.82/618,904.74
  6. Step 6: Final answer
    x = 538,098.52

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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.