Home / 429,746.40-644,621.40-145,439.19

Finding the Fourth Proportional to 429,746.40, 644,621.40 and 145,439.19

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Solution

The fourth proportional to 429,746.40, 644,621.40 and 145,439.19 is: 218,159.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,746.40 : 644,621.40 = 145,439.19 : x
  2. Step 2: Convert to fraction form
    429,746.40/644,621.40 = 145,439.19/x
  3. Step 3: Cross multiply
    429,746.40x = 644,621.40 × 145,439.19
  4. Step 4: Simplify right side
    429,746.40x = 93,753,214,272.67
  5. Step 5: Solve for x
    x = 93,753,214,272.67/429,746.40
  6. Step 6: Final answer
    x = 218,159.39

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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.