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Finding the Fourth Proportional to 346,692.20, 520,038.30 and 213,139.40

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Solution

The fourth proportional to 346,692.20, 520,038.30 and 213,139.40 is: 319,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,692.20 : 520,038.30 = 213,139.40 : x
  2. Step 2: Convert to fraction form
    346,692.20/520,038.30 = 213,139.40/x
  3. Step 3: Cross multiply
    346,692.20x = 520,038.30 × 213,139.40
  4. Step 4: Simplify right side
    346,692.20x = 110,840,651,239.02
  5. Step 5: Solve for x
    x = 110,840,651,239.02/346,692.20
  6. Step 6: Final answer
    x = 319,709.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.