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Finding the Fourth Proportional to 346,689.40, 520,034.10 and 290,702.20

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Solution

The fourth proportional to 346,689.40, 520,034.10 and 290,702.20 is: 436,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,689.40 : 520,034.10 = 290,702.20 : x
  2. Step 2: Convert to fraction form
    346,689.40/520,034.10 = 290,702.20/x
  3. Step 3: Cross multiply
    346,689.40x = 520,034.10 × 290,702.20
  4. Step 4: Simplify right side
    346,689.40x = 151,175,056,945.02
  5. Step 5: Solve for x
    x = 151,175,056,945.02/346,689.40
  6. Step 6: Final answer
    x = 436,053.30

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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.