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Finding the Fourth Proportional to 346,702.40, 478,587.12 and 217,606.40

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Solution

The fourth proportional to 346,702.40, 478,587.12 and 217,606.40 is: 300,383.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,702.40 : 478,587.12 = 217,606.40 : x
  2. Step 2: Convert to fraction form
    346,702.40/478,587.12 = 217,606.40/x
  3. Step 3: Cross multiply
    346,702.40x = 478,587.12 × 217,606.40
  4. Step 4: Simplify right side
    346,702.40x = 104,143,620,269.57
  5. Step 5: Solve for x
    x = 104,143,620,269.57/346,702.40
  6. Step 6: Final answer
    x = 300,383.33

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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.