Home / 328,985.40-493,478.10-129,312.30

Finding the Fourth Proportional to 328,985.40, 493,478.10 and 129,312.30

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Solution

The fourth proportional to 328,985.40, 493,478.10 and 129,312.30 is: 193,968.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,985.40 : 493,478.10 = 129,312.30 : x
  2. Step 2: Convert to fraction form
    328,985.40/493,478.10 = 129,312.30/x
  3. Step 3: Cross multiply
    328,985.40x = 493,478.10 × 129,312.30
  4. Step 4: Simplify right side
    328,985.40x = 63,812,788,110.63
  5. Step 5: Solve for x
    x = 63,812,788,110.63/328,985.40
  6. Step 6: Final answer
    x = 193,968.45

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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.